What is the specific heat of a metal if 100 joules are needed to raise 10 grams of water by 20°c?
a) 0.5 j°c / kg
b) 1.0 j°c / kg
c) 2.0 j°c / kg
d) 200 j°c / kg

Option (A) is the correct answer.

Explanation:

Specific heat is defined as the amount of heat needed to raise the temperature by one degree celsius.

Mathematically,        Q =

where          Q = heat absorbed

                    m = mass

                    C = specific heat

              = change in temperature

Therefore, in 1 kg there are 100 grams so, 10 grams equal 0.01 Kg. Thus, calculate the specific heat value as follows.

                       Q =

                   100 joules =

                       C = 0.5

Thus, we can conclude that specific heat of the given metal is 0.5 .

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