Question

 How much heat in joule is needed to raise the temperature of a 1g water from 20 ℃ to 85℃?

a. 0.065 J b. 65 J c. 217.7 J d. 272.155 J

Answer 1

$$Q=mc\Delta T,$$ Q=1\cdot10^{-3}\ kg\cdot4200\ \dfrac{J}{kg\cdot \!^{\circ}C}\cdot65^{\circ}C=273\ J.