Calculate the mass, in kilograms, of a piece of copper that absorbed 19,550 calories of heat, which caused the temperature to rise 85 degrees Celsius. C = 0.092 cal/g degrees Celsius. Use 2 significant figures.

2.5 kg

Explanation:

Concept being tested: Quantity of heat

We are given the following;

Heat absorbed by a piece of copper, Q = 19,550 calories Temperature change, ΔT = 85°C Specific heat capacity of copper, c = 0.092 cal/g°C

We are required to determine the mass of the piece of copper;

We know that;

Q = m * c * ΔT

Rearranging the formula;

m = Q : cΔT

= 19,550 calories : (0.092 cal/g°C * 85°C)

= 2500 g

but; 1 kg = 1000 g

Thus, mass = 2.5 Kg

Hence, the mass of the copper piece is 2.5 kg