Which of the following is an example of converting kinetic energy into potential energy?
a. dropping your backpack on the floor
b. walking to class with your backpack on
c. sliding the backpack across your desk to a friend
d. picking up your backpack to get out an assignment

9.98 kg of r-134a at 300 kpa fills a rigid container whose volume is 14 l. determine the temperature and total enthalpy in the container. the container is now heated until the pressure is 600 kpa. determine the temperature and total enthalpy when the heating is completed. use data from the steam tables.