Two identical, insulated containers are heated up. One container holds water and the other an equal mass of an unknown liquid, both with the same initial temperature. The water needed 5.2 times more heat to reach the same final temperature as the unknown liquid. What is the specific heat of the unknown liquid?
A. 4.18 J/g·°C
B. 0.804 J/g·°C
C. 1.67 J/g·°C
D. 10.5 J/g·°C
E. 21.8 J/g·°C