1.

The average velocity of an ideal gas at 27^(@)C is 0.3m sec^(-1). The average velocity at 927^(@)C will be

Answer»

0.6 m `SEC^(-1)`
`0.3 m sec^(-1)`
`0.9 m sec^(-1)`
1.2 m `sec^(-1)`

Solution :Average velocity , `mu prop sqrt( T )`
`( mu_(1))/( mu _(2)) = sqrt(( T_(1))/( T_(2)))`
`mu_(1) = 0.3 m sec ^(-1) `,
`T_(1) = 273 + 27 = 300K`
`T_(2) = 927+ 273 = 1200k`
`( 0.3)/( mu_(2)) = sqrt(( 300)/( 1200))`
`mu = 0.3 XX 0.6 m sec^(-1)`


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