How many degrees a glass with a mass of 500 g will heat up if it is given an amount of heat equal to 8.4 kJ.

Given:

m = 500 grams is the mass of a piece of glass;

Q = 8.4 kJ = 8400 Joules – the amount of energy that was transferred to a piece of glass;

c = 700 J / (kg * C) – specific heat capacity of glass.

It is required to determine dt (degree Celsius) – how many degrees a piece of glass will heat up if it is told the amount of heat equal to Q.

Let’s translate the units of measurement of units of mass in the SI system:

m = 500 grams = 500 * 10-3 = 500/1000 = 0.5 kg.

Then, to determine the temperature, you must use the following formula:

Q = c * m * dt, from here we find that:

dt = Q / (c * m) = 8400 / (4200 * 0.5) = 8400/2100 = 84/21 = 4 ° Celsius.

Answer: A piece of glass will heat up to 4 ° Celsius.