NEET Physics: Thermodynamics — Practice Set 4

Q1. Which of the following statements is correct about isothermal processes for an ideal gas?

Q2. Why does an isobaric process involve both internal energy change and work?

Q3. What is the significance of a quasi-static process in thermodynamics?

Q4. In an isobaric process, \( 0.7 \, \text{moles} \) of gas expand from \( 320 \, \text{K} \) to \( 400 \, \text{K} \). What is the heat supplied if \( C_p = 29.1 \, \text{J mol}^{-1} \text{K}^{-1} \)?

Q5. A system absorbs \( 710 \, \text{J} \) of heat and performs \( 260 \, \text{J} \) of work. What is the change in internal energy?

Q6. How much work is done by \( 1 \, \text{mole} \) of an ideal gas in an isothermal expansion from \( 3 \, \text{L} \) to \( 9 \, \text{L} \) at \( 500 \, \text{K} \)? (\( R = 8.3 \, \text{J mol}^{-1} \text{K}^{-1} \))

Q7. A gas at \( 7 \, \text{atm} \) and \( 40^\circ \text{C} \) in a \( 5 \, \text{L} \) container is cooled isochorically to \( -20^\circ \text{C} \). What is the final pressure?

Q8. How much heat is required to raise the temperature of \( 0.2 \, \text{kg} \) of silver from \( 30^\circ \text{C} \) to \( 50^\circ \text{C} \)? (Specific heat of silver = \( 236.1 \, \text{J kg}^{-1} \text{K}^{-1} \))

Q9. A gas undergoes an adiabatic compression from \( 20 \, \text{L} \) to \( 5 \, \text{L} \), increasing its pressure from \( 2 \, \text{atm} \) to \( 16 \, \text{atm} \). What is the value of \( \gamma \)?

Q10. Which of the following statements is incorrect about an isochoric process?

Q11. A gas at \( 6 \, \text{atm} \) and \( 50^\circ \text{C} \) in a \( 4 \, \text{L} \) container is heated isochorically to \( 150^\circ \text{C} \). What is the final pressure?

Q12. Which of the following statements is correct about the Second Law of Thermodynamics?

Q13. A system releases \( 300 \, \text{J} \) of heat and has \( 150 \, \text{J} \) of work done on it. What is the change in internal energy?

Q14. How much heat is required to raise the temperature of \( 0.45 \, \text{kg} \) of aluminium from \( 30^\circ \text{C} \) to \( 60^\circ \text{C} \)? (Specific heat of aluminium = \( 900 \, \text{J kg}^{-1} \text{K}^{-1} \))

Physics — Thermodynamics

Set 4 of 25

21:00

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1Question 1 of 14
Medium

Which of the following statements is correct about isothermal processes for an ideal gas?