Physics

Problem

1.0\,\text{kW}

immersion heater is placed in

1.2\,\text{kg}

of water initially at

20^{\circ}\!\text{C}

. The heater operates continuously for

4.0\,\text{min}

. Assuming no energy losses and that the water remains liquid, what is the water’s final temperature? (The specific heat of water is

4.19\times10^{3}\,\text{J\,kg}^{-1}\,^{\circ}\!\text{C}^{-1}

.) a)

58^{\circ}\!\text{C}

78^{\circ}\!\text{C}

68^{\circ}\!\text{C}

92^{\circ}\!\text{C}