Ch18-p031 - 31 We note from Eq 18-12 that 1 Btu = 252 cal The heat relates to the power and to the temperature change through Q = Pt = cmT

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31. We note from Eq. 18-12 that 1 Btu = 252 cal. The heat relates to the power, and to the temperature change, through Q = Pt = cm Δ T . Therefore, the time t required is 5 (1000cal/ kg C )(40gal)(1000kg / 264gal)(100 F 70 F)(5 C/9 F) (2.0 10 Btu / h)(252.0 cal/ Btu)(1h / 60min)
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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