Question

How much heat has been lost when a 78 g piece of copper is placed into a calorimeter and cools from 120°C to
40°C ? Copper's specific heat capacity is 0.385 J/ 3°C.
2,402.4 J
O-1201.23
1,201.23
0-2,402.4
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2. Aldabad

Answer 1

The amount of heat lost by the copper is 2402.4 J.

To Calculate the amount of heat lost, we use the formula below.

Formula:

• Q = cm(t₂-t₁)................. Equation 1

Where:

• Q = Amount of heat lost
• c = specific heat capacity of copper
• m = mass of copper
• t₂ = Final temperature
• t₁ = Initial temperature

From the question,

Given:

• m = 78 g
• c = 0.385 J/g°C
• t₂ = 120°C
• t₁ = 40°C

Substitute these values into equation 1.

• Q = 78(0.385)(120-40)
• Q = 2402.4 J

Hence, The heat lost by the copper is 2402.4 J

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