Calculate the heat released when 65.5 g of steam at 116.0°C is converted to water at 57.0°C. Assume that the specific heat of water is 4.184 J/g ·°C, the specific heat of steam is 1.99 J/g ·°C,and ΔHvap = 40.79 kJ/mol for water.

How much heat energy, in kilojoules, is required to convert 66.0 g of ice at −18.0 ∘C to water at  25.0 ∘C? Express your answer to three significant figures and include the appropriate units.   The constants for H2O are shown here: Specific heat of ice=2.09 J/(g⋅∘C) Specific heat of liquid water=4.18 J/(g⋅∘C) Enthalpy of fusion ΔHfus=334 J/g Enthalpy of vaporization ΔHvap=2250 J/g

A student leaving campus for spring break wants to make sure the air in her dorm room has a high water vapor pressure so that her plants are comfortable. The dorm room measures 3.25 m × 4.03 m × 3.04 m and the student places a pan containing 0.580 L of water in the room. Assume that the room is airtight, that there is no water vapor in the air when she closes the door, and that the temperature remains a constant 22 °C. The vapor pressure of water at 22 °C is 19.8 mm Hg. Calculate the pressure that the water vapor would exert if all of the liquid water evaporated. mm Hg Will all of the water in the pan evaporate?

Acetic acid has a normal boiling point of 118 ∘C and a ΔHvap of 23.4 kJ/mol. What is the vapor pressure (in mmHg) of acetic acid at 25 ∘C?