A scientist is performing a calorimetric test with an 800-g sample of an unknown substance.She finds that the sample absorbs 152 calories for every ºC it rises in temperature while in its solid phase.What might the substance be?

Question

Quizplus · Accepted Answer

The specific heat capacity (c) is given in kcal/kg·ºC, and the sample absorbs 152 calories (or 0.152 kcal) per ºC for an 800-g (or 0.8 kg) sample. To find the specific heat capacity, we use the formula c = heat absorbed / (mass * temperature change). Since the temperature change is 1ºC and the heat absorbed is 0.152 kcal, c = 0.152 kcal / (0.8 kg * 1ºC) = 0.19 kcal/kg·ºC, which matches granite.

A Scientist Is Performing a Calorimetric Test with an 800-G