If you add 700 kJ of heat to 700 g of water originally at 70.0°C, how much water is left in the container? The latent heat of vaporization of water is 22.6 × $10 ^ { 5 }$ J/kg, and its specific heat capacity is 4186 J/kg ? K.
A)429 g
B)258 g
C)340 g
D)600 g
E)none

Question

Quizplus · Accepted Answer

First, calculate the energy needed to raise the temperature of water from 70°C to 100°C using Q = mcΔT. Then, calculate the energy required to vaporize the water at 100°C using Q = mL. Subtract these from the total energy added to find how much water is vaporized. The remaining mass is the initial mass minus the vaporized mass.

If You Add 700 KJ of Heat to 700 G 10510 ^ { 5 }105

If You Add 700 KJ of Heat to 700 G $10 ^ { 5 }$