30.4 kJ of heat is required to melt one mole of sodium chloride and the entropy change at the melting point is at 1 atm. The melting point of sodium chloride is K (Nearest Integer).

Question

30.4 kJ of heat is required to melt one mole of sodium chloride and the entropy change at the melting point is  at 1 atm. The melting point of sodium chloride is  K (Nearest Integer).

Canvas Classes · Accepted Answer

Strategy:
 At the melting point (equilibrium), the Gibbs free energy change  is zero. Rearrange the formula  to find temperature.

Step 1: Set up the equation
At equilibrium:

Step 2: Calculation
Given .
Given .
.
Rounding to the nearest integer: .

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