Asked by puyr
The boiling point of benzene is 80ºC. Which pair of samples will have the same average kinetic energy as benzene molecules?(1 point)
a sample of liquid benzene at 70ºC and a sample of gaseous benzene at 90ºC
two samples of liquid benzene, one at 70ºC and the other at 80ºC
two samples of gaseous benzene, one at 80ºC and the other at 90ºC
a sample of liquid benzene at 80ºC and a sample of gaseous benzene at 80ºC
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Answer: d.
Explanation: Average kinetic energy of molecules depends only on absolute temperature, not on phase. Both the liquid and gas at 80°C have the same temperature (353 K), so they have the same average molecular kinetic energy.
Explanation: Average kinetic energy of molecules depends only on absolute temperature, not on phase. Both the liquid and gas at 80°C have the same temperature (353 K), so they have the same average molecular kinetic energy.
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