Calculate the amount of heat necessary to raise the temperature of 135.0 g of water from 50.4°F to 85.0°F.The specific heat of water = 4.184 J/g·°C.
A)1.1 kJ
B)10.9 kJ
C)16.6 kJ
D)19.5 kJ
E)48.0 kJ

Question

Quizplus · Accepted Answer

First, convert the temperatures from Fahrenheit to Celsius: 50.4°F = 10.22°C and 85.0°F = 29.44°C. The temperature change (ΔT) is 29.44°C - 10.22°C = 19.22°C. Use the formula q = mcΔT, where m = 135.0 g, c = 4.184 J/g°C, and ΔT = 19.22°C. Calculate q = 135.0 g * 4.184 J/g°C * 19.22°C = 10857.7 J = 10.9 kJ.

Calculate the Amount of Heat Necessary to Raise the Temperature