Which of the following is a characteristic of an isothermal change?
Correct answer: B. Temperature is constant
- A. Enthalpy is constant
- B. Temperature is constant
- C. Pressure is constant
- D. No heat enters or leaves the system
Explanation
An isothermal change refers to a process in which the temperature of a system remains constant throughout the process. In an isothermal change, the system is in thermal equilibrium with its surroundings, meaning there is no temperature difference between the system and its surroundings.
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About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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