Question

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.

Answer 1

2.5 kg

Step-by-step 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