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Calculate the total rotational kinetic energy of all the molecules in 11 mole of air 2525.00ºC.

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Radhika Batra , 9 Years ago
Grade 11
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Navjyot Kalra

Last Activity: 9 Years ago

To find out total rotational kinetic energy E, substitute R/NA for k in the equation E = kT,
E = kT
= R/NA T
For one mole of gas NA =1, the equation E =R/NAT will be,
E = RT
To find out the total rotational kinetic energy of all the molecules, substitute 25.0̊ C for temperature T and 8.31 J/ K for R for one mole of gas in the equation E = RT,
E = RT
= 8.31 J/ K 25.0̊ C
= 8.31 J /K25+273 K
= 8.31 J/ K298 K
= 2476.38 J
Rounding off to three significant figure, the total rotational kinetic of all the molecule will be 2480 J.

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