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QPage 77: Q6: HC Verma: Concepts of Physics - Volume 2 Specific Heat Capacities of Gases Page 77: Q6 Solution: A rigid container of negligible heat capacity contains one mole …

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often use the constant‑pressure specific heat $C_p$ (or forget the $R$ term) when the container is rigid; remember that at constant volume $Q=nC_v\Delta T$, so you must use $C_v$ and convert calories to joules before comparing with $(3/2)R$ for a monatomic gas.

A rigid container of negligible heat capacity contains one mole of an ideal gas. The temperature of the gas increases by 1� C if 3.0 cal of heat is added to it. The gas may be

Multiple Choice Options

  • A helium
  • B argon
  • C oxygen
  • D carbon dioxide

Step-by-Step Verified Solution

**Answer:** (a) helium. **Step-by-Step Explanation:** For a rigid container, Q = nC_v_T. 3.0 cal = 1 _ C_v _ 1. C_v = 3.0 cal/mol�C = 12.6 J/mol�C � (3/2)R. This is a monatomic gas, so helium.

All Questions in this Chapter

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