Question

A 550 kJ of heat quantity needed to increase water temperature from 32°C to 80°C. Calculate the mass

of the water when the specific heat capacity of water is 4200 J/kg °C.​

Answer 1

2.728 kg

Step-by-step explanation:

The units help you keep the calculation straight.

`\frac{550\text{ kJ}}{(80^\circ\text{C}-32^\circ\text{C})(4.200\text{ kJ/kg\,$^\circ$C})}=(550)/(48\cdot4.2)\text{ kg}\approx\boxed{2.728\text{ kg}}`