Using Table, calculate the heat change needed for each of the following at the boiling/condensation point:
a. joules to condense 10.0 g of steam
b. kilojoules to condense 76.0 g of acetic acid
c. joules to vaporize 44.0 g of ammonia
d. kilojoules to vaporize 5.0 kg of water
Table
| Heats of Fusion and Heats of Vaporization for Selected Substances | ||||
Liquid | Formula | Melting point (°C) | Heat of Fusion (J/g) | Boiling point (°C) | heat of Vaporization (J/g) |
Water | H2O | 0 | 334 | 100 | 2260 |
Ethanol | C2H5OH | −114 | 109 | 78 | 841 |
Ammonia | NH3 | −78 | 351 | −33 | 1380 |
Acetone | C3H6O | −95 | 99.3 | 56 | 335 |
Acetic acid | C2H4O2 | 17 | 192 | 118 | 390 |
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