Verified Solution • 2025–26 Session moderate

QPage 12: Q5: HC Verma: Concepts of Physics - Volume 2 Heat and Temperature Page 12: Q5 Solution: A solid object is placed in water contained in an adiabatic…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often overlook that in an adiabatic system any heat lost by the water must be gained by the solid; without a phase change (shape unchanged) the solid’s internal energy increase manifests as a temperature rise. Assuming the solid’s temperature could stay constant despite receiving heat is the common error.

A solid object is placed in water contained in an adiabatic container for some time. The temperature of water falls during this period and there is no appreciable change in the shape of the object. The temperature of the solid object

Multiple Choice Options

  • A must have increased
  • B must have decreased
  • C may have increased
  • D may have remained constant

Step-by-Step Verified Solution

**Answer:** (a) must have increased. **Step-by-Step Explanation:** In an adiabatic container, no heat enters or leaves the system. The temperature of water falls, meaning water loses internal energy. This energy must have been transferred to the solid object. Since the object's shape doesn't change (no phase change), its temperature must have increased.

All Questions in this Chapter

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