What is the relation between work done by the gas and work done on the gas?
What is the relation between work done by the gas and work done on the gas?
V. The magnitude of the work done when a gas expands is therefore equal to the product of the pressure of the gas times the change in the volume of the gas. By definition, one joule is the work done when a force of one newton is used to move an object one meter.
How does density relate to gas?
As you know, density is defined as the mass per unit volume of a substance. Since gases all occupy the same volume on a per mole basis, the density of a particular gas is dependent on its molar mass. A gas with a small molar mass will have a lower density than a gas with a large molar mass.
What is the relation between density and force?
The relation between force ‘F’ and density ‘d’ is F = x/√(d) .
Is work done on gas positive or negative?
The work done by a gas expanding against an external pressure is therefore negative, corresponding to work done by a system on its surroundings. Conversely, when a gas is compressed by an external pressure, ΔV < 0 and the work is positive because work is being done on a system by its surroundings.
What happens to work when gas expands into vacuum?
Since the vacuum offers no resistance, the work is zero. In a vacuum,there is nothing that the gas can do work on! Also,there is nothing that the gas has to overcome its pressure to expand,so the work it does in expanding is zero.
Do gases separate by density?
The primary reason why you don’t get separation of gases in the atmosphere by density is that the atmosphere (especially the lower atmosphere) is turbulent. The second reason, but one that is unimportant in the lower atmosphere, is diffusion.
Do gases have same density?
Because gases that are behaving ideally under the same conditions (temperature, pressure) all have the same number density (see previous section), they will all have different mass densities since different gases have different masses per particle.
How does density relate to acceleration?
Calculating the Force Density If the only force on the mass is gravity, then the force density is equal to the mass density times the acceleration due to gravity, g = 9.81 m/s^2: f=ρg.
How do you calculate work density?
In other words, follow these steps:
- Find density and volume, then use them to calculate mass.
- Multiply mass by the gravitational constant to find force.
- Multiply force by distance to get work.