Solid magnesium has a specific heat of 1.01 J/g°C. How much heat is given off by a 20.0 gram sample of magnesium when it cools from 70.0°C to 50.0°C?
Let's get started by using the specific heat capacity equation:
Based on what you've given me, we have the mass of the sample (m), the specific heat (c), and the change in temperature
I should also add that "m" isn't limited to just water, it can be the mass of almost any substance. Also,
All of the variables have good units, so we just have to multiply all of the given values together to obtain Q (energy transferred).