Heat Supplied to a system

[005321227]

(a) Calculate the heat that must be supplied to a copper kettle of mass 400.0 g containing 300.0 g of water to raise its tem- perature from 20.0 8C to the boiling point of water, 100.0 8C. (b) What percentage of the heat is used to raise the temperature of the water?

I am slightly confused on how to go about the problem; what does the copper kettle and its mass have to do with the problem? is this a composite section?

[McKenna_4A]

Simply use q=g(Csp)T for both copper and water and add the two values together. This will give you total heat.

[005384106]

Are Cs and Cm both constants? Can I chose to use Kelvin or Celcius or do I need to use a certain unit unit of measurement in the measurement for specific head of the heat equation.

[Eunice Nguyen 4I]

Are Cs and Cm both constants? Can I chose to use Kelvin or Celcius or do I need to use a certain unit unit of measurement in the measurement for specific head of the heat equation.

Lavelle mentioned in class that we should be choosing Kelvin for the most part whenever we're calculating. However, make sure that your end result is in the unit that is given in the problem.

[Elizabeth Harty 1A]

Why do you include the mass of the copper, I thought you only used the mass of the water?

[Minh Ngo 4G]

You need the mass to use q=mc(delta)T

[Anthony Hatashita 4H]

Think of this problem as having two parts: first you heat up the copper, then the water. You add up the change in energy for both of them to find the total.