1.

A gasoline tank made of steel is filled completely with 60 litres of gasoline, both at a temperature of 12^@C . How much gasoline will overflow when the temperature is increased to 25^@C ? alpha_("steel") = 1.1 xx 10^(-5) ""^@C^(-1) gamma_("gasoline") = 9.5 xx 10^(-4) ""^@C^(-1)

Answer»

Solution :Volume of gasoline = Volume of steel tank, V = 60l
`Delta T = 15 - 12 = 13^@C`
` gamma_("gasoline") = 9.5 xx 10^(-4) ""^@C^(-1)`
Change in volume of gasoline is
`DeltaV_(g) = gamma_("gasoline") V Delta T`
` = 9.6 xx 10^(-4) xx 60 xx 3`
Change in volume of steel tank,
` Delta V_s= gamma_("steel") V Delta T`
` = 3 alpha_("steel") V Delta T`
` = 3 xx 1.1 xx 10^(-5) xx 60 xx 13`
Volume of gasoline that overflows is
` Delta V_g- Delta V_s = 9.5 xx 10^(-4) xx 60 xx 13 -3 xx 1.1 xx 10^(-5) xx 60 xx 13`
` = (9.5 xx 10^(-4) - 3 xx 1.1 xx 10^(-5) ) xx 60 xx 13`
` = (9.5- 0.33) xx 10^(-4) xx 60 xx 13`
`= 9.17 xx 60 xx 13 xx 10^(-4) ` = 0.715 litres


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