In a saucepan, 2 kg of water was heated at 20C. How much energy is consumed for heating?

In a saucepan, 2 kg of water was heated at 20C. How much energy is consumed for heating? Specific heat capacity of water 4200 J / kg

Given:

m = 2 kilograms is the mass of water in the pan;

dT = 20 degrees Celsius – the temperature at which the water was heated;

c = 4200 J / (kg * C) – specific heat of water.

It is required to determine Q (Joule) – the amount of consumed energy.

Since the problem statement is not specified, the energy losses associated with heating the pan itself are not taken into account. Then:

Q = c * m * dT = 2 * 4200 * 20 = 40 * 4200 = 168000 Joules = 168 kJ.

Answer: to heat the water, an energy equal to 168 kJ (168,000 Joules) was consumed.