Question

A student places a beaker containing 100 ml of water over a lit bunsen burner but gets distracted and does not notice that the beaker boils dry. Calculate the amount of heat energy, in kJ, that was absorbed by the water in the beaker as it evaporated at 100 degrees celsius.

Answer 1

As the latent heat of vapourisation is

2260kJ.

Although 100ml of water is evapourated water only absorbs 2260kJ of heat energy,As it cannot absorb more heat than that.