Calculate the amount of heat required to raise the temperature of an 74 g sample of water from 31 Celsius to 63 Celsius

Question

Express your answer using two significant figures

Answer 1

q = mC∆T

q = heat = ?

m = mass = 74 g

C = specific heat of water = 4.184 J/gº

∆T = change in temperature = 63º - 31º = 32º

Solving for q:

q = (74 g)(4.184 J/gº)(32º)

q = 9908 J = 9900 J = 9.9 kJ