BITSAT 2015 Paper

The third law helps to calculate the absolute entropies of pure substances at different temperature. The entropy of the substance at different temperature. T may be calculated by the measurement of heat capacity change
ST−S0 = ΔS =

T

∫

0

Cp.dt

T

Where ST = Entropy at T K
S0 = Entropy at 0K
= CP.loge T
= 2.30 CP log T