Water (2450g) is heated until it just begins to boil. If the water absorbs 5.0510 5 Jof heat in the process, what was the initial temperature of

1) Water (2450g) is heated until it just begins to boil. If the water absorbs 5.05×105Jof heat in the process, what was the initial temperature of the water?
Express your answer with the appropriate units
2 )An unknown substance has a mass of 14.5 g . When the substance absorbs 1.305×102 J of heat, the temperature of the substance is raised from 25.0 ∘C to 45.0 ∘C . What is the most likely identity of the substance?
3) Calculate the amount of heat required to raise the temperature of an 93 g sample of water from 31 ∘C to 64 ∘C.Express your answer using two significant figures.