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A metal of mass 200g at a temperature of 100oC is placed in 100g of...

Physics
WAEC 2011
A metal of mass 200g at a temperature of 100oC is placed in 100g of water at 25oC in a container of negligible heat capacity. If the final steady temperature is 30oC, calculate the specific heat capacity of the metal. [specific heat capacity of the water is 4200 Jkg-1 K-1]
  • A. 150 Jkg-1K-1
  • B. 300 Jkg-1K-1
  • C. 320 Jkg-1K-1
  • D. 1960 Jkg-1K-1
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Correct Answer: Option A
Explanation
MC\(\theta\)metal = MC\(\theta _{water}\)

0.2 x C x 70 = 0.1 x 4200 x 5

C = 150
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