XI_PHYSICS_HEAT AND THERMODYNAMICS_10 Online Test

What is the depression in the melting point of ice produced by one atmosphere increase of pressure (Latent heat of ice =80 cal/gram, specific volume of 1 gram of ice at 0oC =1.091 cm3, specific volumes of 1 gram of water at 0oC =1.000 cm3)?
0.0026oC
0.0074oC
0.01036oC
0.05038oC
What is the increase in the boiling point of water at 100oC when the pressure is increased by one atm [latent heat of vaporization of steam =540 cal/gram, volume of 1 gm of steam =1677 cm3]?
20.13oC
28.32oC
27.92 K
21.29 K
What is the change in the boiling point of water when the pressure of steam on its surface is increased from 1 atm to 1.10 atm?
-3.792oC
-2.729oC
-4.852oC
3.852oC
What is the change in the melting point of ice when it is subjected to a pressure of 100 atm. (Density of ice =0.917 g/cm3 and latent heat of ice =336 J/g)?
0.7326oC
0.5323oC
0.4857oC
0.2892oC
At what pressure water will boil at 120oC, if the change in specific volume when 1 gm of water is converted steam is 1,676 cm3?
1.3254 atm
1.7254 atm
1.928 atm
2 atm
What is the change in temperature of boiling water when the pressure is increased by 27.12 mm of Hg, the normal boiling point of water at atmospheric pressure being 100oC (Latent heat =537 cal/gram, specific volume of steam= 1674 cm3)?
1oC
5oC
13oC
25oC
The electrons cannot escape to the outer space because of the attractive forces at the surface that tend to keep the electrons within the metal. The attractive forces are
Much smaller than the atmospheric pressure
Much greater than the liquid pressure
Much smaller than the pressure at absolute temperature
Much greater than the electron gas pressure
Work scale and ideal gas scale are identical at
100oC
98.4oC
0 K
273 K
Even at the absolute zero, a substance does retain an appreciable amount of energy aptly called
Unit-point energy
Stable energy
Zero-point energy
Ideal-gas energy
According to Clapeyron’s latent heat equation, if V2 is greater V1, then the melting point of the substance will ______ with increase in pressure.
Decrease
Increase
First increase then decrease
First decrease then increase
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