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What is the work done in an isochoric process?
A. Zero
B. Maximum
C. Infinite
D. Depends on pressure
Answer: Zero
Which of the following statements is true for an ideal gas?
A. The molecules do not interact with each other
B. The molecules have a definite volume
C. The molecules experience strong intermolecular forces
D. The gas is incompressible
Answer: The molecules do not interact with each other
Which law states that the volume of a gas is directly proportional to its temperature at constant pressure?
A. Charles' law
B. Boyle's law
C. Avogadro's law
D. Gay-Lussac's law
Answer: Charles' law
What is the SI unit of entropy?
A. J/K
B. J/kg
C. J/s
D. W/m·K
Answer: J/K
Which temperature is considered absolute zero?
A. 0 K
B. -273.15 °C
C. -459.67 °F
D. All of the above
Answer: All of the above
What type of thermodynamic process occurs without heat exchange?
A. Adiabatic
B. Isothermal
C. Isobaric
D. Isochoric
Answer: Adiabatic
Which phase change occurs when a solid turns directly into a gas?
A. Sublimation
B. Condensation
C. Vaporization
D. Freezing
Answer: Sublimation
What is the specific heat of water in J/kg·K?
A. 4186
B. 1000
C. 273
D. 373
Answer: 4186
What is the critical point in a phase diagram?
A. The point where liquid and gas phases become indistinguishable
B. The melting point of a substance
C. The freezing point of a substance
D. The temperature at which all three phases coexist
Answer: The point where liquid and gas phases become indistinguishable