How much heat is required to raise the temperature of a 2.0 kg of water (specific heat = 1.0 cal/g°c) from 5.0°c to 100.0°c?

The heat required to raise the temperature of 2 kg of water from 5°C to 100°C is 190000 cal (190 Kcal).

Explanation:

To solve this problem you have to use the formula that relates the heat (q) with mass (m), specific heat (s) and variation of the temperature (ΔT) for the substance. You have to express mass in units of grs, so 2 kg =2000 grs.

⇒ q = m·s·ΔT⇒ q = (2000 grs)·(1.0 cal/g°C)·(100°C - 5°C)

⇒q= 190000 cal = 190 Kcal.

The heat required to raise the temperature of 2 kg of water from 5°C to 100°C is 190000 cal (190 Kcal).