A 54.74g sample of water at 83.0C is added to a sample of water at 24.5 C in a constant pressure calorimeter. If the final temperature of the combined water is 42.8 C and the heat capacity of the calorimeter is 26.3 J/ C, calculate the mass of the water originally in the calorimeter.

m = ? grams

Question

A 54.74g sample of water at 83.0C is added to a sample of water at 24.5 C in a constant pressure calorimeter. If the final temperature of the combined water is 42.8 C and the heat capacity of the calorimeter is 26.3 J/ C, calculate the mass of the water originally in the calorimeter.

m = ? grams

preetha · Answer

This uses the equation, Heat lost = Heat gained.
Heat is lost by the warmer objects.  Use m.s. $$\Delta$$t to calculate heat change.

preetha · Answer

ms(Delta)t

preetha · Answer

Heat lost by water (m.s.deltat) + calorimeter (m.s.delta t) = Heat gained by water