alleryIn thermodynamics, energy exchanged because of a temperature difference is called:
- Entropy
- Enthalpy
- Heat
- Work
Show answer and solution
Correct answer: C. Heat
Heat, q, is energy transferred as a result of a difference in temperature.
NEET UG Thermodynamics — practice questions — page 4
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In thermodynamics, energy exchanged because of a temperature difference is called:Read the answer and worked solution →Ionization energy and electron affinity, unlike the matching enthalpies, are defined at:Read the answer and worked solution →Heat from an exothermic reaction favours spontaneity because it:Read the answer and worked solution →For a gas reaction with ∆ng = +1 at 300 K, ∆H - ∆U is about:Read the answer and worked solution →Molecules spinning like a top show which kind of motion?Read the answer and worked solution →
Worked practice questions
Ionization energy and electron affinity, unlike the matching enthalpies, are defined at:
- Room temperature, 298 K
- Ice point, 273 K
- Absolute zero, 0 K
- The boiling point
Show answer and solution
Correct answer: C. Absolute zero, 0 K
These energies are defined at 0 K; at other temperatures heat capacity terms convert them to enthalpies.
Heat from an exothermic reaction favours spontaneity because it:
- Cools the system itself
- Raises surroundings entropy
- Lowers surroundings entropy
- Raises the system enthalpy
Show answer and solution
Correct answer: B. Raises surroundings entropy
Released heat disorders the surroundings, making the total entropy change positive.
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