Heating of water under atmospheric pressure is an ______________ process?

Related Mcqs:

1. The vapour pressure of water is given by, in Psat = 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__________________?

   A. 0.07
   B. 0.09
   C. 0.11
   D. 0.13

2. For water at 300°C, it has a vapour pressure 8592.7 kPa and fugacity 6738.9 kPa Under these conditions, one mole of water in liquid phase has a volume of 25.28 cm3 and that in vapour phase in 391.1 cm3.Fugacity of water (in kPa) at 9000 kPa will be__________________?

   A. 6738.9
   B. 6753.5
   C. 7058.3
   D. 9000

3. Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are pv B and pv w respectively. The partial pressure of benzene in air-vapour mixture is_________________?

   A. PvB
   B. xB.PvB
   C. (Patm – Pvw)xB
   D. xB.Patm

4. With increase in pressure (above atmospheric pressure), the Cp of a gas_____________________?

   A. Increases
   B. Decreases
   C. Remains unchanged
   D. First decreases and then increases

5. Atmospheric pollution caused by the exhaust gas of supersonic transport air-crafts is mostly in the atmospheric region called________________?

   A. Thermosphere
   B. Stratosphere
   C. Troposphere
   D. Mesosphere

6. All gases except ____________ shows a cooling effect during throttling process at atmospheric temperature and pressure?

   A. Oxygen
   B. Nitrogen
   C. Air
   D. Hydrogen

7. All gases during throttling process at atmospheric temperature and pressure show a cooling effect except__________________?

   A. CO2
   B. H2
   C. O2
   D. N2

8. Water on heating from 1 to 4°C___________________?

   A. Contracts
   B. Expands
   C. Has same volume
   D. May contract or expand

9. Heat capacity of air can be approximately expressed as, Cp = 26.693 + 7.365 x10-3 T, where, Cp is in J/mole.K and T is in K. The heat given off by 1 mole of air when cooled at atmospheric pressure from 500°C to – 100°C is ____________________?

   A. 10.73 kJ
   B. 16.15 kJ
   C. 18.11 kJ
   D. 18.33 kJ

10. Atmospheric pressure corresponds to a hydrostatic head of_________________?

    A. 13.6 cms of Hg
    B. 34 ft ofH2O
    C. 1 metre of H2O
    D. 13.6 metres of Hg