Two rigid boxes have ideal gases on a table. Box A has 1 mole of N2 at temperature T not while box B has 1 mole He at temperature (6/5)T not. Gases reach common final temperature when boxes are put in thermal contact with each other(Ignore heat capacities of boxes). What will be final temperature of gases Tf in terms of T not? [Tf = 43 Tnot/40]
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