Heat is supplied uniformly at the rate of 100W to 1.0 x 10-2kg of a…

Heat is supplied uniformly at the rate of 100W to 1.0 x 10-2kg of a liquid for 20 seconds. If the temperature of the liquid rises by 5oC, then the specific heat capacity of the liquid is
  • A.
    2.0 x 102Jkg-1k-1
  • B.
    2.0 x 102Jkg-1
  • C.
    4.0 x 104Jkg-1k-1
  • D.
    4.0 x 104kg-1
  • E.
    8.4 x 103Jkg-1k-1
Correct Answer: Option C
Explanation

Heat energy = Electrical energy
mc(theta) = power x time
5 x 1 x 10-2 x C = 100 x 20
C = 4.0 x 104Jkg-1k-1

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