A sample of chromium weighing 254 g was initially at a temperature of 25.88 °C. It required 843 joules of heat energy to increase the temperature to 32.75 °C. What is the molar heat capacity of the chromium? Hint: It might help to calculate the specific heat capacity first.

Question

Quizplus · Accepted Answer

First, calculate the specific heat capacity (c) using q = mcΔT: c = q / (mΔT) = 843 J / (254 g * 6.87 °C) = 0.487 J/g°C. Then, convert to molar heat capacity using the molar mass of chromium (51.996 g/mol): 0.487 J/g°C * 51.996 g/mol = 25.1 J/mol°C.

A Sample of Chromium Weighing 254 G Was Initially at a Temperature