Physics help from experts.


Thermodynamics Quiz


Enter all answers, then click "Check your answers" near the bottom of this page.
Make sure to enter your answers in the specified units.

1. A g piece of metal (specific heat of 0.104 cal/g-ºC) is warmed so that its temperatre increases by 5.80ºC. How much heat (in calories) was transferred into it?

2. A window pane 0.318 cm thick has an area of 1.80 square meters. The temperature difference between the inside and outside surfaces of the window is ºC . What is the rate of heat flow through this window in J/s if the thermal conductivity for glass is 0.8 J/(s-m-ºC)?

3. How many kilowatt hours of energy are required to raise the temperature of 30000 gal of water by ºC? One gal of water has a mass of about 3.8 kg and the specific heat of water is 4186 J/kg-ºC

4. How many kg of ice need to be added to kg of water at 22.0ºC to cool the water to 10.0ºC? (Lf = 80 kcal/kg)

5. An engine exhausts J of heat while performing 1228 J of useful work. What is the per cent efficiency of the engine?

Check your answers You can not change your answers after they have been submitted.

May The Force be with you.