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We have an unknown mass of liquid water at 15 °C. It is heated by 15,000...

We have an unknown mass of liquid water at 15 °C. It is heated by 15,000 calories and its produces the mixture: liquid water-steam. Water vapor is 40% of the mixture. The specific heat of liquid water is 1.00 cal/g °C, and its latent heat of boiling is 539.7 cal/g. Determine the initial mass of liquid water.

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