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Thermodynamics Problems In this assignment we will use metric units; here is a short summary of these units: Force is measured in Newtons (N) Volume
Thermodynamics Problems
In this assignment we will use metric units; here is a short summary of these units:
Force is measured in Newtons (N)
Volume is measured in cubic meters (m3)
Work and Energy are measured in Joules (J)
1 Joule = 1 Newton*meter
Entropy is measured in Joules per Kelvin (J/K)
Be sure to show all of your work.
- What type of measuring device relies on Zeroth's Law and how does it do tis?
- The temperature outside is 72 degrees Fahrenheit. What is the temperature in Kelvin?
- An isolated system absorbs a heat transfer of 65J and performs 20 J of work. What is the internal energy of the system?
- An isolated system contains some amount of internal energy. If 55 J of heat are transferred into the system, but the internal energy remains the same, how much work must be done by the system?
- How much work is done by a jet engine that exerts 145 N of force over a distance of 1 km?
- A gas maintains a constant pressure of 89 N/m2 while being heated. The resulting change in volume is 0.24 m3. What is the work done by the gas?
- The same gas in problem 6 had an internal energy of 60 J and a final volume of 2 m3. What is the enthalpy (H) of the gas?
- The combustion process inside a jet engine creates 300 J of heat and does 120 J of work spinning a turbine shaft. What is the change in specific enthalpy of the gas?
- Through an irreversible process, object A transfers 560 J of heat to object B. The resulting temperature of the system is 241 K. What is the entropy of the system?
- For an ideal gas, if the pressure remains the same but the volume is doubled, what would you expect to happen to the temperature? Why? **Hint: use the equation of state to help justify your answer.
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