The molar heat capacity of solid aluminium is 24.4 J K^-1 mol^-1 at 25°C. Calculate the change in internal energy when 1.00 mol of solid aluminium is heated from a temperature of 20°C to 30°C.

Question

Quizplus · Accepted Answer

The change in internal energy for a solid, under constant volume, can be calculated using the formula ΔU = nCΔT, where n is the number of moles, C is the molar heat capacity, and ΔT is the change in temperature. Here, n = 1.00 mol, C = 24.4 J/(mol·K), and ΔT = 30°C - 20°C = 10°C. Thus, ΔU = 1.00 mol * 24.4 J/(mol·K) * 10 K = 244 J.

The Molar Heat Capacity of Solid Aluminium Is 24