# physics

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500g of water at 40 deg C and 200g of a mixture of ice and water are combined. The final temperature is 10 deg C. How much of the original 200g mixture was ice?

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Since the final T is 10 C, all of the ice melts in the icewater mix. The original water loses 500 g*30C* 1cal/C g = 150,000 Cal to the icewater. Write an equation for the heat transferred to the icewater in which the amount of ice in the mix (x) is the unkown.

I will be glad to critique your work, but have done serval of these for you. Now it's your turn.

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