Use a table for the Vapor Pressure of Water to answer the following. Report temperatures to the nearest 5 °C and pressures to the near a) What are the pressure of water and the dew point in a system in which the relative humidty is 50.5% at 70 °C? Pressure of water = 118.01 v torr Dew Point = X °C b) The pressure of water vapor in the atmosphere is found to be 23.8 when it is 40 °C. What are the dew point and relative hunidty? Dew Point = °C Relative Humidity = X %

he following reaction illustrates the decomposition of hydrogen peroxide (H2O2) to form water and oxygen gas:2 H2O2 (l) → 2 H2O (l) + O2 (g)When this reaction is carried out, 0.50 L of O2 gas is collected over water at a total pressure of 1.05 atm. The temperature is 23°C. The vapour pressure of water at this temperature is 0.0278 atm.What was the mass (in g) of the hydrogen peroxide that decomposed?

Based on the graph which describes two liquids, A and B, select ALL of the FALSE statements. XA OA The substance with the higher pure vapor pressure (P") is B OB. The substance with the higher pure vapor pressure (P°) is A OC. For any mixture of A and B (any ratio of A and B), the mole fraction of B in the vapor phase will be larger than the mole fraction of B in the liquid phase. OD. An equimolar mixture of liquids A and B are placed in a closed container (25 °C). At equilibrium, the vapor above the mixture will contain more moles of B than A OE Substance B has greater intermolecular forces than A MacBook Pro esc %23 & 1 2 3 4 5 6 7 8 9. delete Q E R T. Y tab A D F G J K os lock > V B N M control option command command option vapor pressure

Four liquids are described in the table below. Use the second column of the table to explain the order of their freezing points, and the third column to explain the order of their boiling points. For example, select '1' in the second column next to the liquid with the lowest freezing point. Select '2' in the second column next to the liquid with the next higher freezing point, and so on. In the third column, select '1' next to the liquid with the lowest boiling point, '2' next to the liquid with the next higher boiling point, and so on. Note: the density of water is 1.00 g/mL. solution 7.6 g of ethylene glycol (C₂H60₂) dissolved in 500. mL of water 7.6 g of propylene glycol (C3H8O₂) dissolved in 500. mL of water 7.6 g of potassium acetate (KCH3CO₂) dissolved in 500. mL of water 500. mL of pure water freezing point (choose one) O (choose one) (choose one) (choose one) X boiling point (choose one) (choose one) (choose one) (choose one) Ś

Use the plots in the figure here to rank the three liquids in order of increasing enthalpy of vaporization. 760- Pvap (torr) 900 800 700 600 500 400 300 200 100 34.6° Diethyl ether Ethanol 78.4° 100.0⁰ Water 0 10 20 30 40 50 60 70 80 90 100 Temperature (°C) where the lines cross x = 0 In (Pap) Water 1/T (K) left plot: vapor pressure at the highest temperature displayed left plot: vapor pressure at the lowest temperature displayed right plot: relative slopes of the lines Diethyl ether Which aspects of the two sets of plots are useful for ranking the liquids in terms of enthalpy of vaporization? -Ethanol

On a particular hot day, the temperature is 30°C and the partial pressure of water vapor in the air is 21.0 torr. What is the relative humidity?