It takes 23.5 kJ of heat energy to raise the temperature of 100 g of a substance by 50°C. What is the subtance?

Ammonia

Water

Ice

Hydrogen

Heat energy = MCΔT; where m is the mass, c is the specific heat capacity; while ΔT is the change in temperature.

Mass is 100 g, while change in temperature 50°C and heat energy is 23.5 kJ or 23500 j

Hence; 23500 = 100 * c * 50

c = 23500/5000

= 4.7 j/g/°c or 4700 J/Kg/°C

The substance is ammonia since it has the specific heat capacity is 4.7 J/g/°C