Specific Heat Capacity and Metals?

Question

1) What is the final temperature when 100 joules of thermal energy is added to 15.0 grams of copper at 20.0°C. The specific heat capacity of copper is 0.385 J/g°C.

2) The temperature of a mass of tin increases from 24.0°C to 34.0°C when 250 joules of thermal energy are added. Calculate the mass of the tin. The specific heat capacity of tin is 0.228 J/g°C.

I'm having trouble right now because I don't know where to start. I've dealt with tons of questions before, but not one in this form!

Thank you so much!

Answer 1

1) 37.3 °C.

          100 J = 0 385 J/ g °C x  15 g x (f -20°C)

            100  = 5.775 x (f - 20°C)

          17.32 = f -20°C

      37.32°C = f

2) 109.6 g

           250 J = 0.228 J/g °C x  g  x  10 °C

              250 = 2.28  x  g

        109.65 = g