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If you have 320.0 mL of water at 25.00 °C and add 140.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

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  1. the sum of the heats gained is zero (one looses heat, so is a negative heat gained).

    Heatgaindcool+heatgainedhot=0
    320c(Tf-25)+140c(tf-95)=0
    do the algebra (notice c divides out), solve for Tf

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  2. how do i solve for Tf?

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