A steel tank is completely filled with 2.50 m^3 of ethanol when both the tank and the ethanol are at a temperature of 31.5 C.
When the tank and its contents have cooled to 15.5 C, what additional volume of ethanol can be put into the tank?
Physics HELP!.............?
2012-05-01 2:55 am
回答 (2)
2012-05-01 3:07 am
✔ 最佳答案
Thermal coif of expansion for ethanol is 250e-6/K∆V/V = 3α∆T
∆V = V3α∆T = (2.5)(3)(250e-6)(31.5–15.5) = 0.03 m³
2016-05-07 4:16 pm
β for steel is 35e-6
β for ethanol is 750e-6
∆V(ethanol)=(Vo)β∆T=2.5(750e-6)(16)=0.03 m^3
∆V(steel)=(Vo)β∆T=2.5(35e-6)(16)=1.4e-3
additional volume of ethanol can be put = 0.03 - 1.4e-3 = 0.0286
β for ethanol is 750e-6
∆V(ethanol)=(Vo)β∆T=2.5(750e-6)(16)=0.03 m^3
∆V(steel)=(Vo)β∆T=2.5(35e-6)(16)=1.4e-3
additional volume of ethanol can be put = 0.03 - 1.4e-3 = 0.0286
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