1.

The rms speed of N_2 molecules in a gas is u. If the temperature is doubled and the nitrogen molecules dissociate into nitrogen atoms, the rms speed becomes :

Answer»

`u//2`
`2U`
`4U`
`14u`

Solution :`(C_1)/(C_2) = sqrt((T_1)/(M_1) xx (M_2)/(T_2)) implies U/(C_2) = sqrt((T_1)/(28) xx 14/(2T_1))`
`(U_2)/(C_2^2) = 1/4 implies C_2 = 2U`.


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