Target Exam

CUET

Subject

Physics

Chapter

Thermodynamics

Question:

When 1 kg of ice at 0°C melts to water at 0°C, the resulting change in its entropy, taking latent heat of ice to be 80 cal/g is : 

Options:

293 cal/K

273 cal/K

8 x 104 cal/K

80 cal/K

Correct Answer:

293 cal/K

Explanation:

Q = mL = 80×1000 cal = 80,000 cal

\(\Delta S = \frac{\Delta Q}{T}\)

\(\Delta S = \frac{80,000}{273} = 293 cal/K\)