Question

how does the heat required to raise the temperature of water by a certain amount compare with the heat required to raise the same mass of iron by the same amount? take s.p. heat of water 4186Jkg^-1k^-1,and specific heat of iron 452Jkg^-1k^-1​
please answer me correctly

Answer 1

ANSWER

If by supplying a heat of Q to a substance of mass m, its temperature increases by Δt, then

Q∝mΔt

or Q=cmΔt

where c= constant of proportionality , called specific heat capacity of the body.

Now, if m=1,Δt=1

o

C ,

then, Q=c

therefore, specific heat is the heat required to raise the temperature of unit mass of substance by one degree Celcius.