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Gasses have two specific heat capacities because the boundary conditions can affect the number by up to 60%. Therefore, a number is given to each boundary condition: isobaric (constant pressure) or isochoric (constant volume). In an ideal gas, they differ by the quantity R (the gas constant - the same one you use in the ideal gas law):
Cp = Cv + R
where Cp is the isobaric molar heat capacity (specific heat) and Cv is the isochoric molar heat capacity.
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Define molar specific heats of a gas?
the ratio of amount of heat requried to raise the temprature of 1 mole of compound 1 to the amount of heat requried to raise temprature substance such as wate 1 at a specified temprature also known as specific heat .
Is the molar kinetic energy of chlorine gas equal to greater to or less than the molar kinetic energy of nitrogen at 25 degrees Celsius?
equal to
To find the change in the internal energy of a system which equation would you use?
change in eternal energy= n*Cv*delta T n= moles Cv= molar specific heat of gas at constant volume Delta
What does a molar volume of a gas at STP occupy?
22.4 liters.
Graham's law states that the rate of effusion of a gas is inversely proportional to the square root of the?
molar mass
What is the relation of the molar heat of fusion to the molar heat of vaporization?
Molar heat of fusion: the heat (enthalpy, energy) needed to transform a solid in liquid (expressed in kJ/mol). Molar heat of vaporization: the heat (enthalpy, energy) needed to transform a liquid in gas (expressed in kJ/mol).
Why is the molar specific heat of the diatomic gas usually larger than that of mono-atomic gas?
A monatomic gas has no contribution from vibration to its specific heat. A diatomic gas has both vibration of the two atoms as the stretch and compress the bond between them and can rotate faster or slower. With more ways to store energy than just translational energy, diatomic gases tend to have higher heat capacities.
How does the phase of water affect its specific heat capacity?
Typical heat capacities are (exact values depend on temperature): Solid (Ice): 2.108 kJ/kg·K Liquid (water): 4.187 kJ/kg·K Gas (water vapor/steam): 1.996 kJ/-kg·K In comparison - you can see that liquid water has a higher heat capacity that ice or steam.
What three things affect airpressure?
Heat, number of molecules, atmospheric pressure and volume Volume * Pressure = molecules * molar gas constant * Heat
What is the values of molar gas constant R when volume is in milliliter?
Probable 8,314462 1(75) cm3MPaK−1 mol−1.
Define molar specific heats of a gas?
the ratio of amount of heat requried to raise the temprature of 1 mole of compound 1 to the amount of heat requried to raise temprature substance such as wate 1 at a specified temprature also known as specific heat .
Is the molar mass of gas dependant on the type of gas?
Yes as is the molar mass of anything else.
Why we use two type of molar specific heat?
For gases, there is heat specific heat capacity under the assumption that the volume remains constant, and under the assumption that the pressure remains constant. The reason the values are different is that when heating up a gas, in the case of constant pressure it requires additional energy to expand the gas. For solids and liquids, "constant volume" isn't used, since it would require a huge pressure to maintain the constant volume.
Molar volume of liquid is greater than molar volume of gas. why?
That's not true. The molar volume of a gas is always greater than the molar volume of a liquid. I can't think of any exceptions to this.
What does molar volume mean for a gas?
Molar gas volume is the volume of ONE moel of gas. It only depends on the pressure and temperature, not on the kind of gas. Molar volume at standard temperature and standard pressure is always 22,4 Litres (for any gas)
What is the molar mass of amonia gas?
Molar mass of NH3 = 17.03052g/mol
Does a fireplace that runs on gas work with propane?
It can- but propane and natural gas have different heat values- check with your gas company to see if yours can be converted SAFELY.
