Example 1: A 36.0 g sample of water is initially at 10.0 °C.
How much energy is required to turn it into steam at 200.0 °C? (This
example starts with a temperature change, then a phase change followed
by another temperature change.)
Lithium is a good reducing agent because it is electropositive [it rapidly gains electrons] fluorine is good oxidizing agent electronegative [it loses electrons fastly]