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Q. Explain why does heated air expand?
Answer:-
Temperature is habitually defined as the average thermal energy of the substance at hand. Therefore the hotter a substance is the additional thermal energy it has. For the majority substances the statistical mechanics formula (3/2) kT works fine. In the previous formula k is the Boltzmann constant and T is the absolute temperature.
As thermal energy enlarge the molecules of a substance move faster. These molecules strike other molecules faster and harder and bounce away from collisions faster and harder. With no container to limit its shape a gas will merely expand. Were a container show the pressure of the gas in the container would increase.
The vapour pressure of a substance at 20.0 o C is 38.1 kPa and its enthalpy of vaporisation is 49.6 kJ mol -1 . Estimate the temperature at which its vapour pressure is 80.0 k
A 2.00 x 10 3 -g sample of water at 100.0°C is mixed with a 4.00 x 10 3 -g sample of water at 0.0°C in a calorimeter. What is the equilibrium temperature of the mixture?
I have a chandelier that hangs in front of my tv, when I look at the tv I can see the chandelier in the tv. What physics phenomenon is this? reflection?
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Im having trouble understanding these,, could someone explain them in lamens terms
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