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The vapour pressure of water is given by, in P<sub>sat</sub> = A - (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K.The vapor pressure of water in atm. at 50°C is approximately

Correct Answer: 0.13

Consider the following statements and choose the correct answer:
1. A direct proportionality exists between vapour pressure and the concentration of water vapour in the atmosphere
2. Relative humidity is an expression of the ratio of the actual vapour pressure of the atmosphere when saturated at the same temperature
3. A rise or fall in temperature with no change in vapour pressure will cause a drop or rise, respectively, in relative humidity
4. A rise or fall in vapour pressure with no change in temperature will be accompanied by a rise or fall, respectively, in relative humidity

At 100°C, water and methylcyclohexane both have vapour pressures of 1 atm. Also at 100°C, the latent heats of vaporisation of these compounds are 40.63 kJ/mole for water and 31.55 kJ/mole for methylcyclohexane. The vapour pressure of water at 150°C is 4.69 atm. At 150°C, the vapour pressure of methylcyclohexane would be expected to be

A vessel contains air and vapor H2O, if the partial pressure of vapor H2O is 4 atm and pressure of air is 1 atm, what is the fraction of vapor H2O in vessel?

In vapor compression cycle having dry saturated vapor at the end of compression the refrigeration effect is given by? H1 – Enthalpy of vapor before compression H4 – Enthalpy of vapor before entering evaporator H2 – Enthalpy of vapor after compression

The fraction of water vapor at 300 K and 8 atm is 0.8. Calculate the fraction of water vapor at the same temperature and 1 atm pressure?

A vessel of volume 1000 m3 contains air which is saturated with water vapour. The total pressure and temperature are 100 kPa and 20°C respectively. Assuming that the vapour pressure of water at 20°C is 2.34 kPa, the amount of water vapour (in kg) in the vessel is approximately

The vapour pressure of a solid M varies with temperature T in K, as
In p(atm) = $$frac{{ - 33,200}}{T}$$ - 0.85 In T + 21.46
The vapour pressure of liquid M varies with temperature T, in K, as
In p (atm) $$frac{{ - 33,200}}{T}$$ = 0.85 In T + 20.31
The temperature of the triple point of M, in K is

For 5 moles of an ideal gas, Condition I: Pressure = 1 atm, Volume = 2 L, Temperature = 27 Degree Celsius Condition II: Pressure = P atm, Volume = V L, Temperature = T K. 5. If The Pressure and Volume in the II condition are 2 atm and 4 L, what is the temperature (T) of the gas?

An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively.The humidity of air sample expressed as kg of water vapour/kg of dry air is

The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the