A 31.5-g glass thermometer reads 23.6C before it is placed in 135 mL of water. When the

Question:

A 31.5-g glass thermometer reads 23.6°C before it is placed in 135 mL of water. When the water and thermometer come to equilibrium, the thermometer reads 41.8°C. What was the original temperature of the water? Ignore the mass of fluid inside the glass thermometer.