What is an example chemical energy practice problem?

Example Problem: If a 2.34 g substance at 22°C with a of 3.88 cal/g-°C is heated with 124 cal of energy, what is the new temperature of the substance?

Answer:   ΔT = q

MC   ΔT = (124)

(2.34)(3.88) = 13.7°C   new T = 22 + 13.7 = 35.7°C Two other common heat variables are the heat of fusion and the heat of vaporization. Heat of fusion is the heat required to melt a substance at its melting temperature, while the heat of vaporization is the heat required to evaporate the substance at its boiling point.Shodor.org