Calculate the change of entropy (in J K^-1 mol^-1) when 1 mol of methanol is heated at constant pressure from 5 °C to 35 °C, the molar heat capacity, C_p, of methanol is 81.6 J K^-1 mol^-1, assume that the molar heat capacity, C_p is constant over this temperature range.

Question

Quizplus · Accepted Answer

The change in entropy (ΔS) can be calculated using the formula ΔS = C_p * ln(T2/T1), where T1 and T2 are the initial and final temperatures in Kelvin. Converting 5 °C and 35 °C to Kelvin gives 278.15 K and 308.15 K, respectively. Thus, ΔS = 81.6 * ln(308.15/278.15) = 8.36 J K^-1 mol^-1.

Calculate the Change of Entropy (In J K-1 Mol-1) When

Calculate the Change of Entropy (In J K^-1 Mol^-1) When