# Tag Info

### Reversible path for Entropy change on crystallisation

Part (b) The supercooled liquid is not in equilibrium with the solid and therefore $\Delta G$ is not zero, so you cannot calculate the entropy for the phase change from $\Delta H(265)/265$. You can't ...
• 28.2k
1 vote

### Can anyone help me with the derivation for the formula of entropy?

For an ideal gas undergoing a reversible process, the 1st law of thermodynamics tells us that $$cU=nC_vdT=dq-PdV=dq-\frac{nRT}{V}dV$$Dividng both sides of this equation by T then gives: \frac{dq}{T}...
• 12.3k