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Question
Find the amount of heat needed to raise the temperature of a silver container of mass 100 g by 10 °C. (c = 0.056 cal/g °C)
Solution
Given: Mass (m) = 100 g, change in temperature (ΔT) = 10 °C
specific heat of silver (c) = 0.056 cal/g °C
To find: Heat energy (Q)
Formula: Q = m c ΔT
Calculation: According to principle of heat exchange,
Energy supplied to silver container = Energy gained by silver container
From formula,
Q = 100 × 0.056 × 10 = 56 cal
Heat energy needed to raise temperature of the silver container is 56 cal.
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