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1. |
Which of the following quantities is not a measurable macroscopic property of a gas? |
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Pressure |
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Volume |
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Temperature |
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Amount of gas |
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Kinetic energy |
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2. |
Which of the following expressions for the ideal gas law is correct?
(P = Pressure, T = Temperature, V = Volume) |
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PT / V =constant |
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PV / T = constant |
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VT / P = constant |
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P / TV = constant |
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TPV = constant |
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3. |
Which of the following equations is INCORRECT?
(P = Pressure, V = Volume, T = Temperature, k = universal gas constant per molecule,
n = number of moles, N = total number of molecules, Na = Avogadro number,
R = universal gas constant = molar gas constant) |
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PV = nRT |
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PV = NkT |
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PV = (N/Na)RT |
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PV = (Na)RT |
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PV = nk(Na)T |
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4. |
When the temperture is kept constant and the volume of the gas is reduced,
then the pressure of the gas will |
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increase |
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decrease |
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remain unchanged |
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cannot be determined |
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first decrease, then return to the original value |
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5. |
Five particles moving with speeds shown in the table. What is the average speed of these particles?
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1 m/s |
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14 m/s |
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4.4 m/s |
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7.4 m/s |
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10 m/s |
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6. |
Referring to Q5, the root mean square speed of the molecules is |
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1 m/s |
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1.4 m/s |
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4.5 m/s |
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7.4 m/s |
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10 m/s |
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7. |
Which of the following expressions for the root mean square speed of gas molecules is correct?
(c = speed of a molecule) |
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8. |
The area under a PV graph equals to
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the internal energy of a gas |
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the potential energy of the gas molecules |
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the kinetic energy of the gas molecules |
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the work done by/on the gas |
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the total energy stored in the gas molecules |
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9. |
An inexpansible container is filled with air at 30  .
The air is now heated to 60
at constant pressure. What is the percentage of the air left in the container? |
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91% |
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87% |
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67% |
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50% |
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43% |
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10. |
Which of the following statements about adiabatic expansion of a gas is correct? |
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Work done on the gas is positive |
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Temperature of the gas increases |
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Temperature of the gas remains unchanged |
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Internal energy of the gas decreases |
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Internal energy of the gas increases |
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