A biology experiment requires the preparation of a water bath at 37.08C (body temperature). The temperature of the cold tap water is 22.08C, and the temperature of the hot tap water is 55.08C. If a student starts with 90.0 g cold water, what mass of hot water must be added to reach 37.08C

75 g

Explanation:

= Initial mass of water = 90 g

c = Specific heat of water

= Initial temperature difference =

= Mass of water to be added

= Final temperature difference =

Since, heat energy in the system is conserved we know

The mass of water to be added to reach the desired temperature is 75 g.