2000 joules are required to heat 125 grams of an unknown substance from 10 c to 28 c. What is the specific heat of the substance?

Hello! Specific heat is the amount of energy required by known amount of substance to raise its temperature by one degree celsius. In our question it is given that 2000J energy when supplied to 125 g of unknown substance raised its temperature by 18 oC. So, The specific heat is calculated as follow;