Download Physics Practice - Pressure and Thermodynamics

Physics Practice - Pressure and Thermodynamics
Name: ________________________
In your own words, describe what the words mean:
Pressure
Absolute Pressure
Gauge Pressure
Pascals
Atm
Buoyancy
Fluid
Density
Archimedes Principal
Heat
Temperature
Internal Energy
Work
Entropy
Joules
Energy
Heat capacity
Adiabatic
Isothermal
Isovolumetric
Expansion
Compression
Physics Practice - Pressure and Thermodynamics
1.) Which has the greatest entropy, a shuffled deck of cards or an ordered set of cards.
.
2.) Explain the difference between temperature and Heat?
.
3 If the gas in a container absorbs 275 joules of heat has 125 joules of work done on it, and
then does 50 joules of work, what is the increase in the internal energy of the gas?
4.) What is the difference between Internal energy and Heat?
5.) Which item has the greatest internal energy? All items are at room temperature
(A) A cup of water
(B) A gallon of water
(C) A pencil
(D) An apple
6.) A tire is expanded gradually at constant temperature. Describe what type of process it
is and the values for ΔU, Q and W
7.) A helium weather balloon is thermally insulated and expands during inflation. Describe
what type of process it is and the values for ΔU, Q and W
8.) Heat is added to an open pan of water at 100C, vaporizing the water. The expanding
steam results in 57kJ of work, and the internal energy increases by 750kJ. How much
energy is transferred to the system as heat?
Physics Practice - Pressure and Thermodynamics
9 .) A balloon is inflated with helium at constant pressure that is 4 x 105 Pascals in excess of
atmospheric pressure. If the balloon inflates from a volume of 1.5 x 10-4 m3 to 6 x 10-4 m3, how
much work is done on or by the system during expansion?
10.) A 2.0 kg quantity of water is held at constant volume in a pressure cooker and is heated by
a range element. The systems internal energy increases by 8.0 x 103 Joules. However, the
pressure cooker is not well insulated and as a result, 2 x 103 Joules is transferred to the
surrounding air. How much energy is transferred from the range element to the pressure cooker
as heat?
11.) A rock has a mass of 12 grams. It's volume is 5 ml. What is its density?
12) A raft is 2 meters by 1 meter by 0.25 meters and has a mass of 0.5 kg. What is the mass
the raft can support before it sinks?
13.) 80 PSIG = ? Pascals
14.) Hot air balloon problem similiar to page 99 in notebook.
Physics Practice - Pressure and Thermodynamics
15.) What pressure does a diver experience 55 meters below the ocean floor, given that the
density of sea water is 1025 kg/m3
15.) Explain what is going on in steps #1 to #6 in this diagram. For each step, explain what the
thermodynamic values are doing for the Freon.
1.
2.
3.
4.
5.
6.
Physics Practice - Pressure and Thermodynamics