Thermochemistry Calculations?

If the specific heat of water is 4.184 J/g.C degrees, how much energy is needed to raise the temperature of a 50 gram sample of water 12 degrees C?

1 Answer
May 8, 2018

3000J or 3kJ

Explanation:

Use q = mcDeltaT for equations like these.
q = Energy/heat
m = Mass
c = Specific Heat
DeltaT = Change in temperature.

Insert your values, and you are given:

q = "50g" * "4.184J/g°C" * 12°C

Our grams and °C cancel out:

q = 50 * "4.184J" * 12

q = 2510.4J

After applying sig figs, we get 3000J, or 3kJ of energy.