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11 August, 23:06

245 g water sample initially at at 32 oC absorbs 17 kcal of heat. What is the final temperature of water?

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  1. 11 August, 23:20
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    Answer:62.66°C or 235.66K

    Explanation:Q=McpT, the energy was given in calories so you first convert to Joules by multiplying the value in calories by 4.184J.

    17*4.184=71.128kJ.

    71.128kJ=mcpT

    71.128kJ=245*4.187 * (T-Tm)

    Tm is the final temperature of the mixture. The T is the temperature given which should be converted to Kelvin by adding 273 ... T=32+273=305K.

    71128J=245*4.187 * (305-Tm)

    71128=312873.575-1025.815Tm

    1025.815Tm=312873.575-71128

    1025.815Tm=241745.58

    Tm=241745.58/1025.815

    Tm=235.66K
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