1.

When gases are mixed, the internal energy will remain conserved. When external energy provides heat energy there may be temperature variation leading to internal energy change and/or volume variation spending/gaving work/energy. The change is internal energy is independent of the path followed, while work and heat energy depends on the path followed. Internal energy depends onthe number of degrees of freedom which in turn affects the ratio of specific heat capacities.Two perfect gases of n_1 and n_2moles at absolute temperatures T_1 and T_2are mixed. The temperature of the mixture will be,

Answer»

`T = (n_1T_2 + n_2T_1)/((n_1+n_2))`
`T = (n_1T_1 + n_2T_2)/((n_1+n_2))`
`(n_2T_1 - n_2T_2)/((n_1+n_2))`
`(n_1T_2 - n_2T_1)/((n_1+n_2))`

ANSWER :B


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