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Standard XII

Chemistry

Heat Capacity

A copper weig...

Question

A copper weight and iron weight of the same mass were dropped from the same height on the ground Which of the weights had the higher temperature after the impact ? (specific heat of Cu $=$ 0.1 Kcal/ kg $^{o} C$ ;specific heat of iron $=$ 0.11 Kcal/kg $^{o} C$ )

Iron weight

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Copper weight

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Both iron and copper

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Cannot be answered

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Solution

The correct option is A Copper weight
As the two bodies are of same mass and dropped from same height, the final Kinetic Energy is also same for both the bodies.
When they hit the ground and this is converted to heat, the body with lower specific heat capacity will have higher rise in temperature.
$Q = m C Δ T$
As copper has lower Specific heat capacity, its temperature will be higher.

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A copper weight and iron weight of the same mass were dropped from the same height on the ground Which of the weights had the higher temperature after the impact ? (specific heat of Cu = 0.1 Kcal/ kgoC ;specific heat of iron = 0.11 Kcal/kgoC)

A copper weight and iron weight of the same mass were dropped from the same height on the ground Which of the weights had the higher temperature after the impact ? (specific heat of Cu $=$ 0.1 Kcal/ kg $^{o} C$ ;specific heat of iron $=$ 0.11 Kcal/kg $^{o} C$ )