Phase Changes (Section)
(a) What is the significance of the critical pressure of a substance? (b) What happens to the critical temperature of a series of compounds as the force of attraction between molecules increases? (c) Which of the substances listed in Table can be liquefied at the temperature of liquid nitrogen (-196 °C)?
Table Critical Temperatures and Pressures of Selected Substances
Substance | Critical Temperature (K) | Critical Pressure (atm) |
Nitrogen, N2 | 126.1 | 33.5 |
Argon, Ar | 150.9 | 48.0 |
Oxygen, O2 | 154.4 | 49.7 |
Methane, CH4 | 190.0 | 45.4 |
Carbon dioxide, CO2 | 304.3 | 73.0 |
Phosphine, PH3 | 324.4 | 64.5 |
Propane, CH3CH2CH3 | 370.0 | 42.0 |
Hydrogen sulfide, H2S | 373.5 | 88.9 |
Ammonia, NH3 | 405.6 | 111.5 |
Water, H2O | 647.6 | 217.7 |
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.