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Science question involving coolant through a motor vehicle

  • 21-08-2012 05:16PM
    #1
    Lady Law
    Registered Users, Registered Users 2 Posts: 14 ✭


    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


Comments

  • #2
    kirving
    Registered Users, Registered Users 2 Posts: 6,318 ✭✭✭kirving


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


  • #3
    Neodymium
    Registered Users, Registered Users 2 Posts: 179 ✭✭Neodymium


    28l = 28kg due to relative density of 1

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


  • #4
    kirving
    Registered Users, Registered Users 2 Posts: 6,318 ✭✭✭kirving


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


  • #5
    Lady Law
    Registered Users, Registered Users 2 Posts: 14 ✭Lady Law


    Thanks for that Kevin and Neodymium :)


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