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The following physics responses are provided by a student and, as such, should be considered in that context. While every effort is made for accuracy, absolute correctness cannot be fully guaranteed.
| C | I | Question | Answer |
|---|---|---|---|
| 10 | Evaporation cools the liquid that is left behind because the molecules that leave the liquid during evaporation: | have greater than average speed. | |
| 10 | For an ideal gas of a given mass, if the pressure remains the same and the volume increases: | the average kinetic energy of the molecules increases. | |
| 10 | How many atoms are present in a sample of pure iron with a mass of 300 g? (The atomic mass of iron = 56 and NA = 6.02*10^23) | 3.2*10^24 | |
| 10 | How many moles of air must escape from a 10-m X 8.0-m X 5.0-m room when the temperature is raised from 0°C to 20°C? Assume the pressure remains unchanged at one atmosphere while the room is heated. | 1.2*10^3 moles | |
| 10 | If it is given that 546 K equals 273°C, then it follows that 400 K equals: | 127°C | |
| 10 | If the temperature of an ideal gas contained in a box is increased: | the average speed of the molecules in the box will be increased. | |
| 10 | John rapidly pulls a plunger out of a cylinder. As the plunger moves away, the gas molecules bouncing elastically off the plunger are: | rebounding at a lower speed than they would have if the plunger weren't removed. | |
| 10 | Normal body temperature for humans is 37°C. What is this temperature in kelvins? | 310 | |
| 10 | One mole of an ideal gas at 1.00 atm and 0.00°C occupies 22.4 L. How many molecules of an ideal gas are in one cm3 under these conditions? | 2.69*10^19 | |
| 10 | One way to heat a gas is to compress it. A gas at 1.00 atm at 25.0°C is compressed to one tenth of its original volume, and it reaches 40.0 atm pressure. What is its new temperature? | 919°C | |
| 10 | Suppose the ends of a 20-m-long steel beam are rigidly clamped at 0°C to prevent expansion. The rail has a cross-sectional area of 30 cm2. What force does the beam exert when it is heated to 40°C? (αsteel = 1.1*10^-5/C°, γsteel = 2.0*10^11 N/m2). | 2.6*10^5 N | |
| 10 | The absolute temperature of an ideal gas is directly proportional to which of the following properties, when taken as an average, of the molecules of that gas? | kinetic energy | |
| 10 | The coefficient of area expansion is: | double the coefficient of linear expansion. | |
| 10 | The ideal gas law treats gas as consisting of: | molecules | |
| 10 | The internal energy of a monatomic ideal gas is equal to which of the following? | (3/2)PV |
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