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Calculate the total rotational kinetic energy of all the molecules in 1 mole of air 25.0ºC.
To find out total rotational kinetic energy E, substitute R/NA for k in the equation E = kT,E = kT = (R/NA) TFor one mole of gas (NA =1), the equation E =(R/NA)T will be,E = RTTo 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 /K)(25+273) K = (8.31 J/ K)(298 K)= 2476.38 JRounding off to three significant figure, the total rotational kinetic of all the molecule will be 2480 J.
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