posted by Isis on .
1) Peter is heating water on the stove to boil eggs for a picnic. How much heat is required to raise the temperature of his 10.0-kg vat of water from 20.0℃ to 100.0℃?
2)Under the spreading chestnut tree of the village blacksmith dunks red-hot horseshoe into a large bucket of 22.0℃ water. How much heat was lost by the horseshoe in vaporizing 0.0100 kg of water?
3)By January, the 3.0 kg of water in the birdbath in Robyn's backyard has frozen to a temperature of -7.0℃. As the season changes, how much heat must be added to a water to make it a comfortable 25℃ for the birds?
Please help me!! :)
Thank you soooo much!! :D