calculate the amunt of heat required to completely boil 250g of water starting from room temp 22 degrees C

Answer 1

q1 = heat to raise T from 22 to 100.
q1 = mass x specific heat water x (Tfinal-Tinitial)

q2 = heat to vaporize the water.
q2 = mass water x heat vaporization.

Total q = q1 + q2