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Science question involving coolant through a motor vehicle

Lady Law · 2012-08-21 16:16:45

Hi all, Not sure exactly where to be posting this at all. But have a problem question for my study. Here it is: Coolant is passed through a motor vehicle radiator at a rate of 28 litres per minute. The coolant enters the radiator at a temperature of 95 degrees celcius and exits at 75 degrees celcius. If the specific heat…

21-08-2012 4:16pm

#1

Lady Law

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Join Date: December 2011

Posts: 10

Hi all,

Not sure exactly where to be posting this at all. But have a problem question for my study. Here it is: Coolant is passed through a motor vehicle radiator at a rate of 28 litres per minute. The coolant enters the radiator at a temperature of 95 degrees celcius and exits at 75 degrees celcius. If the specific heat capacity of the coolant is 4.2kJ/kgK, determine the quantity of heat given up to the cooling air per minute. ( take the value of the relative density of the coolant as 1)

Any help with the above would be much appreciated

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Comments

#2 21-08-2012 6:07pm

kirving

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I'll do it for you now. Will do it in MS Word and past in here.

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#3 21-08-2012 6:32pm

Neodymium

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28l = 28kg due to relative density of 1

Heat = mc(change in temp.) = (28)(4200)(20) = 2352000 joules per minute

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#4 21-08-2012 6:49pm

kirving

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Here you go! Neodymium did it while I was having my dinner!

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#5 29-08-2012 8:54am

Lady Law

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Thanks for that Kevin and Neodymium

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