The table below shows a comparison of the different gas laws. Some cells have been left blank.

Name Variables Constants Equation Boyle's law Pressure, volume? PV = k Charles's law Volume, temperature? V = kT? Temperature, pressure Volume, moles of gas P = kT? Pressure, temperature, volume?

Which are assumed to be constant while using the combined gas law?

1. pressure

2. number of moles

3. volume and moles of gas

4. pressure and temperature

Question

Chemistry

Paris

15 December, 21:46

The table below shows a comparison of the different gas laws. Some cells have been left blank.

Name Variables Constants Equation Boyle's law Pressure, volume? PV = k Charles's law Volume, temperature? V = kT? Temperature, pressure Volume, moles of gas P = kT? Pressure, temperature, volume?

Which are assumed to be constant while using the combined gas law?

1. pressure

2. number of moles

3. volume and moles of gas

4. pressure and temperature

+2

Answers (1)

Know the Answer?

Lukas Lee · Answer 1

The combined gas equation relates three variables pressure, temperature and volume when the number of moles is constant.

The equation is PV / T = constant. Which is valid for a fixed number of moles of the gas.

You can derive the combined gas equation from the combination of Bolye's law, Charles' law and Gay-Lussac's law, which needs some algebra.

Answer: option 2. number of moles.