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4) Which metal a highest and which metal has lowest specific heat capacity?
Aluminum -highest, Iron-lowest specific heat cpacity
What is a specially designed container which prevents all heat transfer between its contents and the surroundings?
Calorimeter, thermos flask
What is the work done on the gas during compression?
Th=700 degree of C, Tc=27 degree of C, find efficiency. of ideal heat engine.
69%
Identify type of process: reversible or irreversible: ‘Ice melts at room temperature, absorbing heat from the air’.
Water never freezes by itself at room temperature, to release heat energy and make room hotter.So it is irreversible process.
Why are we trying to save energy if total energy never changes?
What we are trying to save is not energy, but useful energy that can do work.
Define an adiabatic process. How can we achieve an adiabatic process?
process in which there is no heat transfer into or out of a system and is generally obtained by surrounding with a strongly insulating material
One mole of a gas sample is compressed to half of its original volume. Is the gas hotter at the end of an adiabatic or isothermal compression?
adiabatic compression
What are the 4 processes in a Carnot cycle?
1-2: isothermal expansion 2-3: adiabatic expansion 3-4: isothermal compression 4-1: adiabatic compression
A gas sample expands from initial volume to final volume once isobarically and once along an isotherm. Along which process does the gas do more work?
Along isobarically process do more work
What are three different statements of the second law of thermodynamics?
Ok
Calculate average speed and RMS speed of three particles of speeds 10, 20, 30m/s.
20 m/s and 21.6 m/s
Find the RMS velocity of oxygen molecules at room temperature. T=20 degree of C
478 m/s
Which types of Kinetic energy can a diatomic gas molecule have?
the molecules of a diatomic gas have translational and rotational kinetic energies.
What are the two characteristic differences between vaporization and boiling?
evaporation is slower, occurs only from the surface of the liquid, does not produce bubbles, and leads to cooling. Boiling is faster,
What is the first law of thermodynamics in isothermal and adiabatic process?
dQ=W, W=-dU Q=0
what is the basic equation of kinetic theory of gases in terms of density of gas?
equation


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