Which of the following processes are spontaneous, and which are nonspontaneous? (2023)

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What are the example of spontaneous and Nonspontaneous process?

A process that is spontaneous in one direction under a particular set of conditions is nonspontaneous in the reverse direction. At room temperature and typical atmospheric pressure, for example, ice will spontaneously melt, but water will not spontaneously freeze.

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Which of the following process is a non-spontaneous process?

The process in option b (Boiling of water) is a non sponteneous process as it requires energy in the form of heat.

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Which of the following processes is spontaneous?

Evaporation of water (c) is a spontaneous process as it does not require any external source of energy, it occurs sponteneously (though very slow) at room temperature.

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Is ripening of a banana spontaneous or non-spontaneous?

Natural processes, such as a banana ripening or a lightening strike are spontaneous in the direction they occur and nonspontaneous in the opposite direction. By definition they are irreversible; they do not occur by reversible pathways.

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What are 3 examples of non-spontaneous process?

Some examples of non-spontaneous process are:

Flow of water from sea to the river. Flow of heat from a cold body to a hotter body. Evaporation of water in winter. Melting of ice at zero temperature i.e. at a temperature below 0°C.

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What is an example of non-spontaneous?

A non-spontaneous reaction requires an external agent like heat or light or energy of some sort to make the reaction start. For example, photosynthesis. A plant absorbs water and carbon dioxide. But for it to get converted, sunlight is required.

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What is an example of a spontaneous reaction?

A spontaneous reaction is a reaction that favors the formation of products at the conditions under which the reaction is occurring. A roaring bonfire (see figure below) is an example of a spontaneous reaction.

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What is a spontaneous process provide an example quizlet?

A spontaneous process occurs without ongoing outside intervention (such as the performance of work by some external force). For example, when you drop a book in a gravitational field, the book spontaneously drops to the floor.

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What is a spontaneous process quizlet?

What is a spontaneous process? a process that proceeds on its own without any external influence or input of energy.

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Is freezing non spontaneous?

Freezing of water at room temperature is non - spontaneous process.

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Is evaporation of water spontaneous or Nonspontaneous?

Evaporation is a spontaneous process. Q. Which of the following processes is a non-spontaneous process?

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Which type of reaction is always spontaneous quizlet?

Exothermic reactions are always spontaneous. Endothermic reactions are never spontaneous. Endothermic reactions are never spontaneous. A reaction that leads to an increase in the entropy of the system is always spontaneous.

Which of the following processes are spontaneous, and which are nonspontaneous? (2023)
Is melting spontaneous or Nonspontaneous?

When water changes from a solid to a liquid (melting), or from a liquid to a gas (vaporization), the change in entropy is also positive. Below the melting point, the changes in enthalpy and entropy combine to produce a positive change in free energy for melting, so melting is nonspontaneous (unfavorable).

How do you know if a reaction is spontaneous or Nonspontaneous?

If ΔH is negative and ΔS is positive, the reaction is spontaneous at all temperatures because the change in Gibbs free energy is always negative. Contrastingly, if ΔH is positive and ΔS is negative, the reaction is nonspontaneous at all temperatures as written.

Is melting a spontaneous process?

As ice melts, the intermolecular forces are broken (requires energy), but the order is interrupted (so entropy increases). Water is more random than ice, so ice spontaneously melts at room temperature.

Which of the following conditions is non-spontaneous?

Solution : When `DeltaH=+ve` and `DeltaS=-ve` reaction is non-spontaneous.

Which of the following is condition for non-spontaneous process?

For a reaction to be non-spontaneous it must be endothermic, accompanied by a decrease in entropy.

Which events activities are examples of spontaneous processes?

A spontaneous event (or reaction) is a change that occurs under a specific set of conditions. A ball rolling down a hill, the water falling down in a waterfall, and the dispersion of the smell of a perfume when sprayed in a room (expansion of a gas), are all spontaneous events.

What are some examples of being spontaneous?

spontaneity Add to list Share. Acting with spontaneity might mean bursting into song on the street, or throwing down your rake and jumping in a pile of leaves — in other words, doing something without thinking it through beforehand.

Is photosynthesis a non spontaneous?

Photosynthesis is not a spontaneous reaction, as indicated by the ΔH of the reaction, which is positive and means that energy input is required for the reaction.

What are some spontaneous activities?

25 Fun Spontaneous Things to Do In 2022
  • Take an unplanned road trip. Nothing says spontaneity quite like taking an unplanned road trip. ...
  • Skydive. ...
  • Jump in a lake. ...
  • Go on a weekend away. ...
  • Book a flight somewhere. ...
  • Do something you're scared of. ...
  • Go to the beach.

What are spontaneous reactions quizlet?

spontaneous reactions. occur in nature under a given set of conditions. occur when the products possess a lower energy (enthalpy) and a more random, distorted state (entropy) enthalpy (ΔH) most spontaneous reactions are exothermic.

Which of the natural process is spontaneous?

A spontaneous process is a process which occurs without any external input to the system. This process occurs on its own, without any energy used from the outside. Because spontaneous processes are characterized by a decrease in the system's free energy. So, all natural processes are spontaneous.

What is a spontaneous process Quizizz?

<p>True</p> <p>False</p> Q. What is a spontaneous process ? process that does not need external intervention to occur.

Which process is an example of a spontaneous irreversible process?

An example of an irreversible process is a spontaneous chemical reaction, or electrochemical reaction.

What makes a process spontaneous?

A spontaneous process is one that, once started, continues on its own without input of energy. A non-spontaneous process needs a continual input of energy.

Is melting ice Nonspontaneous?

Since Suniv<0, melting is nonspontaneous (not spontaneous) at −10.0 °C. Since Suniv>0, melting of ice is spontaneous at 10.00 °C.

Is a raindrop falling spontaneous?

(e) A raindrop falling to the ground is nonspontaneous. (f) Iron rusting in a moist atmosphere is spontaneous.

Is iron rusting spontaneous?

Rusting iron is a slow process. But it is a spontaneous process. This is because the rusting of iron occurs on its own. There is no need for external aid for the rusting of iron to occur.

Is condensation spontaneous or Nonspontaneous?

Condensation of water vapor yields work and hence is thermodynamically spontaneous only in a supersaturated atmosphere; in an unsaturated atmosphere it costs work and hence is thermodynamically nonspontaneous.

Is boiling water spontaneous or not?

We can all appreciate that water does not spontaneously boil at room temperature; instead we must heat it. Because we must add heat, boiling water is a process that chemists call endothermic.

Which of the following is an example of a Nonspontaneous reaction?

Therefore, flow of heat from a cold body to a hot body is a non-spontaneous process as it requires external work as per Clausius.

Which reaction is most spontaneous?

Which chemical reaction is always spontaneous? A reaction which is exothermic (ΔH negative) and results in an increase in the entropy of the system (ΔS positive) will always be spontaneous.

Which type of reaction is always Nonspontaneous?

Spontaneous and Nonspontaneous Reactions
Enthalpy Change (ΔH)Entropy Change (ΔS)
Always Spontaneousnegative (exothermic)positive (increased entropy)
Always Nonspontaneouspositive (endothermic)negative (decreased entropy)

Which of the following are correct for spontaneous reaction?

For reaction to be spontaneous, ΔG should be negative, this works if ΔH is negative and ΔS is positive.

What is meant by non spontaneous process?

Process which does not takes place itself or on its own but with the help of external aid under the given condition is called non-spontaneous process. Example: Flow of heat energy from lower to higher temperatures.

Is water spontaneous or Nonspontaneous?

water exists in liquid state naturally at standard state 25∘c=298k. Hence freezing of H2O at 298k is non-spontaneous as ice will absorb heat from surroundings thereby gets converted to the liquid state as it is a natural process of is irreversible.

What is the difference between spontaneous and Nonspontaneous reactions?

Hint:Spontaneous reactions are those chemical or biological reactions that take place without the influence of external factors. Non- Spontaneous reactions are those chemical reactions that require an energy input to proceed or that cannot take place without the influence of external factors.

What is an example of spontaneous question?

Typical spontaneous attitudinal questions are: 'What, if anything, do you like about.? '

What are some examples of spontaneous order?

Core examples of spontaneous order include language, the common law, and the outcomes of evolution.

Is melting ice spontaneous or Nonspontaneous?

As ice melts, the intermolecular forces are broken (requires energy), but the order is interrupted (so entropy increases). Water is more random than ice, so ice spontaneously melts at room temperature.

Is dissolving of salt spontaneous or Nonspontaneous?

If the salt is an insoluble one, i.e. AgCl, the dissolution process is non-spontaneous because the insoluble salt is more stable than the dissociated ions. On the other hand, for soluble salts, i.e. NaCl, the dissolution process is spontaneous because the salt can readily dissociate into component ions.

What type of reaction is always Nonspontaneous?

endothermic

What are the characteristics of non spontaneous process?

The characteristics of a nonspontaneous reaction are;
  • The reactions are endothermic in nature.
  • Gibbs free energy of the reaction is positive.
  • Energy is supplied to the system.
  • Non-spontanious reaction have high activation energy.
  • They do not favour the formation of product.

What are the conditions for non spontaneous reaction?

For a reaction to be non-spontaneous it must be endothermic, accompanied by a decrease in entropy.

What are things that are spontaneous?

Spontaneous things are natural or instinctive, and they happen without warning. If you plan to go to a movie and then you go, that's not a spontaneous thing. Ditching the movie at the last minute to go to the park? That's spontaneous.

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