文档介绍：Thermal Energy Problem Set #1 – Fall 2002
Assigned: 9/6/02
Due: 9/13/02
Time spent on problems:
Problem 1:
Problem 2:
Problem 3:
Problem 4:
Problem 5:
Problem 6:
Problem 7:
Thermal Energy Problem Set #1 – Fall 2002
Assigned: 9/6/02
Due: 9/13/02
Do all problems. Please use a separate sheet of paper for each problem.
1. During a certain cyclic process a system receives 100 kJ of heat from a reservoir
while it is discharging 60 kJ of heat to a sink. Two work quantities are noted during
this process. One is an input work of 15 kJ. Find the other work quantity. Also find
work and state if this is done on or by the system.
2. A system is capable of executing a cyclic process as indicated in the pV sketch; it may
be executed either clockwise abca or counterclockwise adca. (a) When going
clockwise to state c, 80 kJ of heat flow to the system and 35 kJ of work are done by it.
Returning to state a from c, 60 kJ of heat flow from the system. Find the work along
the path ca. (b) When going counterclockwise to state c, 70 kJ of heat flow to the
system. Find the work during the process adc.
Problem 2
3. By how much does the temperature of the airflow through a nozzle change when it
is accelerated from an inlet velocity of 10 m/s to an exit velocity of