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JAMB Physics 1982 Question 4

Question 4

Quantity of Heat

When equal weights of iron and water are subjected to an equal supply of heat, it is found that the piece of iron becomes much hotter than water after a shorter time because

  1. A.the specific heat of iron is higher than that of water
  2. B.iron is in solid form
  3. C.water is in liquid form
  4. D.the specific heat of water is higher than that of iron
  5. E.the specific heat of iron is infinite
Show the answer and explanation

Answer: D (the specific heat of water is higher than that of iron)

Explanation

Water needs much more heat per kilogram per degree than iron (higher specific heat capacity), so the same heat warms the iron more.