Spontaneity of Chemical reactions — Important Questions
Telangana Open School (TOSS) · Class 12 · Chemistry
51 important questions from Spontaneity of Chemical reactions for Telangana Open School (TOSS) Class 12 Chemistry, with answers.
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Important Questions from Spontaneity of Chemical reactions
What happens to the entropy of a system when ice melts into water?
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Entropy increases
When ice melts, molecules gain more freedom to move, increasing disorder and thus entropy.
The formula for entropy change is:
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ΔS = q_rev / T
Entropy change is defined as the reversible heat transfer divided by the absolute temperature at which the transfer occurs.
Which law of thermodynamics states that entropy of the universe increases in a spontaneous process?
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Second Law
The second law of thermodynamics states that the total entropy of the universe increases during any spontaneous process.
At equilibrium, the total entropy change of the universe is:
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Zero
At equilibrium, no net change occurs, so the total entropy change of the universe is zero.
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