JAMB - Physics (1984 - No. 23)
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
2.0 x 102Jkg-1k-1
2.0 x 102Jkg-1
4.0 x 104Jkg-1k-1
4.0 x 104kg-1
8.4 x 103Jkg-1k-1
คำอธิบาย
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
mc\(\theta\) = power x time
5 x 1 x 10-2 x C = 100 x 20
C = 4.0 x 104Jkg-1k-1