Work of 730 J is done by stirring an insulated beaker containing 80 g of water.

What is the change in the temperature of the water?

Please show calculation

1 answer

The work done becomes the same as heat addition, Q = 730J = 174.5 calories.

Q = C M *(delta T)

C = 1.0 cal/(g*degC)
M = 80 g

Solve for deltaT, the water temperature change, in degrees C

deltaT = 174.5 cal/[(1.0 cal/degC)*(80 g)] = 2.2 deg C