# Physics

posted by .

Use the PV diagram of a system. The units for P and V are atmospheric pressure atm and liter L. Process A to B and B to C are straight lines on it.

How much is the work done by the system from A to C in J?

Given these coordinates:(volume on the x, pressure on the y)
A: (1 Li, 3.0 atm)
B: (5 Li, 6.0 atm)
C: (11 Li, 4.5 atm)

• Physics -

A: p₁=3 atm =3.04•10⁵ Pa,
V₁=1 L = 10⁻³ m³;
B: p₂=6 atm = 6.08•10⁵ Pa,
V₂ =5L=5•10⁻³m³;
C: p₃= 4.5 atm = 4.56•10⁵ Pa,
V₃=11L = 11•10⁻³m³.

A->B:
W₁= 0.5(p₁+p₂)( V₂-V₁) =
=0.5(3.04+6.08)•10⁵•(5-1)•10⁻³ =
=1824 J
B->C:
W₂ =0.5(p₂ +p₃)( V₃-V₂) =
=0.5( 6.08+4.56)•10⁵•(11-5)•10⁻³ =
=3192 J

W= W₁+W₂ =1824 + 3192 =5016 J

## Similar Questions

1. ### chemistry

calculate the internal energy change for each of the following. a. one hundred(100.)joules of work are required to compress a gas. at the same time the gas releases 23 J of heat. b. a piston is compressed from a volume of 8.30 L to …
2. ### Physics

A heat engine has the three step cycle shown above. Starting from point A, 1 L (liter) of ideal gas expands in the isobaric (constant pressure) process A to B at P = 2 atm. B to C is isovolumetric process at V = 5 L, and C to A is …
3. ### Physics difficult... chris help again plz.

A heat engine has the three step cycle shown above. Starting from point A, 1 L (liter) of ideal gas expands in the isobaric (constant pressure) process A to B at P = 2 atm. B to C is isovolumetric process at V = 5 L, and C to A is …
4. ### Physics

A heat engine has the three step cycle shown above. Starting from point A, 1 L (liter) of ideal gas expands in the isobaric (constant pressure) process A to B at P = 2 atm. B to C is isovolumetric process at V = 5 L, and C to A is …
5. ### Chemistry

1. A cylinder of Xenon has a volume of 750. ml. At 25.0°C the cylinder has a pressure of 655 torr. How much Argon is present in the cylinder?
6. ### Chemistry

At ordinary body temperature (37 C) the solubility of N2 in water in contact with air at ordinary atmospheric pressure (1.0 atm) is 0.015 g/l. Air is approximately 78 mol % N2. a)Calculate the number of moles of N_2 dissolved per liter …
7. ### CHEMISTRY

At ordinary body temperature (37 C) the solubility of N2 in water in contact with air at ordinary atmospheric pressure (1.0 atm) is 0.015 g/l. Air is approximately 78 mol % N2. a)Calculate the number of moles of N_2 dissolved per liter …
8. ### maths science,sst,hindi,english,economics

one liter of water at atmospheric pressure ismixed with 9 liter of water of 25 degrees at an atmospheric pressure in an insulated tank .find the temprature of tank.options are 1)25 2)32.5 3)30 4) 24........pls. help
9. ### Physics

The process of inhalation in the lung may be modelled (very simplistically) by the pV diagram shown below , in which the pressure drops sharply in the lungs at constant volume, followed by expansion at constant pressure, and then finished …
10. ### Physics

The process of inhalation in the lung may be modelled (very simplistically) by the pV diagram shown below , in which the pressure drops sharply in the lungs at constant volume, followed by expansion at constant pressure, and then finished …

More Similar Questions