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What is the average kinetic energy (in kJ mol-^1) of a hypothetical gas with molecular weight 68 g mol-^1 at a temperature of 72.3 °C? Do not try to identify the gas.

Respuesta :

In order to determine the average kinetic energy, use the following formula:

[tex]K=\frac{3}{2}RT[/tex]

where,

R: gas constant = 8.314J/mol*K

T: temperature of the gas = 72.3+ 273 = 345.3K

Replace the previous values of the parameters into the formula for K:

[tex]K=\frac{3}{2}(\frac{8.314J}{\text{mol}\cdot K})(345.3K)=\frac{4306.23J}{mol}\approx\frac{4.31kJ}{mol}[/tex]

Hence, the average kinetic energy is approximately 4.31kJ/mol

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