heat=mass*lf+ mass*cice*(7)+mass*cwater*25
This assumes an initial temp of the ice at MINUS 7C
1) While Laurie is boiling water to cook spaghetti, the phone rings, and all 1.5 kg of water boils away during her conversation.If the water was initially at 15℃, how much heat must have been gained for all of it to turn into a water vapor?
2)By January, the 3.0 kg of water in the birdbath in the Robyn's backyard has frozen to a temperature of 7.0℃. As the season changes, how much heat must be added to the water to make it a comfortable 25℃ for the birds?
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