Heat and Thermodynamics 2 Question 1

4. An external pressure p is applied on a cube at 0C so that it is equally compressed from all sides. K is the bulk modulus of the material of the cube and α is its coefficient of linear expansion. Suppose we want to bring the cube to its original size by heating. The temperature should be raised by

(2017 Main)

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Answer:

Correct Answer: 4. (d)

Solution:

  1. K=p(ΔV/V)ΔVV=pK

ΔV=pVKpVK=V(3α)ΔT

ΔT=p3αK



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