Question 2
2a.
- State Dalton’s law of partial pressure.
- Identify one type of refrigeration where Dalton’s law of partial pressure is applied.
b. State one difference between the following:
(i) |
absolute pressure |
vacuum pressure |
(ii) |
sensible heat |
latent hea |
(iii) |
dry-bulb temperature |
wet-bulb temperature |
c. A compressor in a refrigerator is rated at 300W. How much electrical energy is used in 20 minutes?
Observation
Question 2c required candidates to calculate much electrical energy is used in 20 minutes for a refrigerated rated 300 W. The expected response is:
