Question

In: Chemistry

1. (a) State if the sign in (+) or (-) for the following description.

Q is ( ) if the test tube is getting hot.

W is ( ) if the system is expanding.

W is ( ) if the work is done by the surrounding on the system.

H is ( ) if the reaction is endothermic.

S is ( ) if solid sublimes.

G is ( ) if the reaction is spontaneous.

(e) Define entropy. Give an example of a reaction that would increase entropy.

Expert Solution

Q is positive that means heat energy is released during the reaction.

Test tube is getting hot because of the evolution of heat energy.

This is an example of exothermic reaction.

W is positive when the work is done by the system.

W is negative when the work is done on the system by the surroundings.

H is positive when the reaction is endothermic.

During an endothermic reaction, heat energy is absorbed by the system.

S(entropy) is positive during sublimation of a solid.

This is because the degree of disorderness increases in case of gases.

G is negative in case of spontaneous reactions.

(e) Entropy is the thermodynamic physical quantity which represents the degree of disorderness of the system.

example: Burning of inscence stick is an example of positive entropy.

Where disorderness of the molecules increases.

queen_honey_blossom answered 2 years ago

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