1.a)How many joules of heat energy do you need to heat 200 mlof water from 20ºC to 80ºC? Use 4.19 J/gºC forthe specific heat of water.
b) How long would it take if the water were being heatedcontinuously by a 50 Watt heater?
c) How much heat energy would it take to heat 100 ml of waterfrom 60ºC to 90ºC? (You can easily answer thisquestion by simply comparing the amount of water and the amount oftemperature change to that in (a) and then adjusting the resultaccordingly).
2) A piece of aluminum (specific heat 0.910 J/gºC) of mass200 g at 80.0ºC is dropped into a foam cup filled with 100 mlof water at 20ºC. Once the system reaches equilibrium,what is the final temperature of the water and the aluminum?