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anonymous

  • 4 years ago

12. A sample of ethylene glycol, used in car radiators, has a mass of 34.8 g. The car releases, 783 J of heat. The initial temperature of the sample is 22.1 0C. What is the final temperature? The specific heat capacity of ethylene glycol is 2.42 (J/g 0C)

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  1. anonymous
    • 4 years ago
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    Would the energy released by negative?

  2. Rogue
    • 4 years ago
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    \[Q = mc \Delta T\] Well, the car released heat, meaning that its temperature will go down. If that happens, Tfinal - Tinitial would be negative, making Q negative.

  3. anonymous
    • 4 years ago
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    so what would be the answer? 31.4?

  4. Rogue
    • 4 years ago
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    Well, the temperature has to drop since energy was released, so does your answer make sense? You probably just made a computational error somewhere.\[-783 J = 34.8 g * 2.42 J/(g*C) * (T _{f}^{} - 22.1 C)\]\[T _{f}^{} = 12.802 C\]

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