15.6 g of carbon graphite releases 49.2 J of heat and the temperature changes from 29.7 °C to 25.3 °C. What is the specific heat capacity of graphite in units of J/g*°C?
a) 0.719 j/g⋅°C
b) 0.732 j/g⋅°C
c) 0.841 j/g⋅°C
d) 0.947 j/g⋅°C