Spontaneity of Chemical reactions — Practice Quiz
Telangana Open School (TOSS) · Class 12 · Chemistry
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Which of the following best defines a spontaneous process?
Which of the following is an example of a spontaneous process?
Entropy is a measure of:
For which state of matter is entropy the highest?
Sample Questions
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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