The vaporization of water is one factor that contributes to the raising of baked goods. When 1.0g of water is vapourized inside a cake at 150c and 105kPa what volume in L of vapour is produced?
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- At which temperature is the vapor pressure of ethanol equal to 80. kPa?A sample of hydrogen gas is collected over water at a total pressure of 28 inches Hg at 22 oC.The vapour pressure of water at 22 oC is 19.8 mmHg. The partial presure of the H2 is?The liquid-vapour equilibrium diagram of the binary water (H2O)-nitric acid (HNO3) under standard pressure is shown in the appendix. The mass fraction of HNO3 is plotted on the x-axis and the temperature on the y- axis. The analysis of a sample of the mixture obtained during the industrial preparation of nitric acid gives a total mass for this sample of 80 g and a mass of 60 g of water. a) Calculate the mass fraction of nitric acid in the mixture.
- 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?(3) A flask contains a sample of mercury. The system is stored at room temperature of 25.00 °C. At what temperature (in both K and °C) would the system have to change to in order to triple the vapor pressure of mercury in the flask?Arrange the following in order of increasing vapour pressure: Ar, NaClO3, H2O, H2Se. Discuss your choice
- 1-Octanol (C8H18O) is a compound used for the synthesis of important component in perfume production (esters). The approximate enthalpy of vaporization of 1-octanol was found to be 72.37 kJ mol–1 and the vapor pressure of 1-octanol was measured to be 6.863 kPa at 20.05 °C. At what temperature (in °C, to two decimal places) would the vapor pressure of 1-octanol equal 0.781 kPa?What mass of H2 gas can be collected over water from a 250-mL flask at a temperature of 25ºC and a pressure of 105.325 kPa? (The vapour pressure of H2O at these conditions is 3.169 kPa.)The vapor pressure of water at 25 C is 23.76 Torr. Estimate the vapor pressure of water at the same temperature in the presence of 2.5 atm of an inert ideal gas that is insoluble in water (e.g., helium). The molar mass of water is 18.02 g/mol, and the density is 0.998 g/cm3.
- What is the pressure, in Pa, of water vapor in equilibrium with the liquid phase at 396.9 K?A sample of vapor weighing 0. 200 g occupies a volume of 55 cc at 270C and 760 mmHg pressure. The critical pressure of the vapour is 47.7 atm, while the critical temperature is 288.50C. by use of the Berthelot equation, calculate the molecular weight of the vapour, and compare the result with that calculated by the ideal gas law.What is the relationship between the volatility of a liquid and its vapour pressure?