Molecular Physics | Thermodynamics Answers

1. The volume of a gas at 0.64 m Hg pressure and 39 temperature is . What is its volume at
standard temperature and pressure?
2. If R= 8.31 J/Kmol, find the volume of 20 g oxygen at 27 and 72 cm Hg pressure.
3. Find the kinetic energy of 3 g nitrogen gas at 29. [ ghram molecular mass of nitrogen is
28g]
4. The mean free path of the molecules of a gas is is m and the diameter of a molecule is m
Find the number of molecules per .
5. The volume of air is made three times the original volume by adiabatic expansion. If the
initial pressure is 1 atmospheric pressure, what is the final pressure? (γ=1.4)

a water tank measures 2m × 4m × 5m. what mass of water will it contain

Ice, in water absorbs heat from water, results a decrease in water temperature. As the heat lost by water is absorbed by ice, leaving the water ice system with same heat.then how does the temperature decrease?

The equation of state, Van der Waals, is used to perform design calculations to estimate
the molar volume of non-ideal gases.
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Ch. 13.2 Thermal Expansion of Solids and Liquids

CQ 6:) Water expands significantly when it freezes: a volume increase of about 9% occurs. As a result of this expansion and because of the formation and growth of crystals as water freezes, anywhere from 10% to 30% of biological cells are burst when animal or plant material is frozen. Discuss the implications of this cell damage for the prospect of preserving human bodies by freezing so that they can be thawed at some future date when it is hoped that all diseases are curable.

A projectile is launched at 60° from the horizontal and lands 50m from the launch point. What was the projectile's speed at launch?

Steam at 7 bar and 250°C enters a pipeline and flows along it at a constant pressure. If the steam rejects heat steadily to the surroundings, at what temperature will droplets of water begin to form in the vapour? Using the steady-flow energy equation, and neglecting changes in the velocity of the stream, calculate the heat rejected per kilogram of steam flowing

the volume of 1 kg of water at 100°C is 10^-3 m³ and the volume of 1 kg of steam at normal pressure is 1.671 m³ latent heat of steam is 2.3 *10^ 6 joule per kg and the normal pressure is 10^ 5 N/m² how much work will be done in converting 5 kg of water at hundred degree Celsius into steam at the same pressure and temperature

Calculate how many grams of ice at 0°C would be melted by 100 g of 100°C steam

Old trains were powered by steam engines. What was most likely needed to produce the steam to power a train?

a. Ice and a furnace to create water.
b. Water and a way to heat the water.
c. Water and very cold chemical to freeze water.
d. Water vapor and a way to cool it to create water.