Physics 12.2 conceptual Q - f

Question

A cup of water is heated with a heating coil that delivers 110 W of heat.

In one minute, the temperature of the water rises by 19 degrees C. What is the mass of the water?

Answer 1

Use the equation   Q = mc(Tf - Ti)

c is a constant for whatever is being heated   4.19J/gC

Remember that the watt (W) is really Joule/second

So just multiply the time by the power to find the heat.

      110W(60s) = 6600J

Plug into the equation and solve for m

6600 = m(4.19)(19)

m = 872.90g