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2). What is the relationship between temperature and volume of a gas and what law uses these two variables ( Boyle's Law, Charles's Law or Lussac's Law?
3). What is the relationship between pressure and volume of a gas and what law uses these two variables (Boyle's Law, Charles's Law or Lussac's Law.

https://en.wikipedia.org/wiki/Boyle%27s_law

https://en.wikipedia.org/wiki/Charles%27s_law

https://en.wikipedia.org/wiki/Gas_laws

To answer the questions about the relationship between temperature and volume of a gas, as well as the relationship between pressure and volume of a gas, we need to refer to the gas laws.

1) Relationship between temperature and volume of a gas:
According to Charles's Law, the volume of a gas is directly proportional to its temperature when pressure and amount of gas remain constant. This means that if the temperature of a gas increases, its volume will also increase, and if the temperature decreases, the volume will decrease. So, Charles's Law describes the relationship between temperature and volume.

2) Relationship between pressure and volume of a gas:
Boyle's Law states that the pressure of a gas is inversely proportional to its volume when the temperature and amount of gas remain constant. This means that if the pressure of a gas increases, its volume will decrease, and if the pressure decreases, the volume will increase. Thus, Boyle's Law describes the relationship between pressure and volume.

To summarize:
- The relationship between temperature and volume of a gas is described by Charles's Law.
- The relationship between pressure and volume of a gas is described by Boyle's Law.