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viva [34]
3 years ago
7

The autoignition of both ethanol and octane occurs at 363 oC. Which gas sample contains the gas molecules that have a greater av

erage kinetic energy
Chemistry
1 answer:
USPshnik [31]3 years ago
7 0

Answer:

See explanation

Explanation:

At the same temperature, the average kinetic energy of gases depends on the molecular mass of the gas. Hence,  given a particular temperature, lighter molecules travel faster on the average than heavier molecules.

Considering ethanol and octane, The molar mass of ethanol is 46.07 g/mol while the molar mass of octane is 114.23 g/mol. Hence, ethanol has a greater average kinetic energy than octane at the same temperature.

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