COMBINED GAS LAW PPT for grade 8 science.pptx

COMBINED GAS LAW

1. COMBINED GAS LAW

2. WHAT ARE YOUR THOUGHTS WHEN YOU SAY “COMBINED GAS LAW”?

3. True or False: The Combined Gas Law is used to calculate the relationship between pressure, volume, and temperature of a gas when the number of gas molecules is constant. True or False: In the Combined Gas Law, temperature must always be measured in Celsius. True or False: If the volume of a gas remains constant, the Combined Gas Law reduces to Gay-Lussac’s Law. True or False: The Combined Gas Law can only be used when one variable (pressure, volume, or temperature) remains constant. True or False: The Combined Gas Law formula is derived from Boyle’s, Charles’s, and Gay-Lussac’s laws.

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5. When we put Boyle's law, Charles' law, and Gay-Lussac's law together, we come up with the combined gas law, which shows that:  Pressure is inversely proportional to volume, or higher volume equals lower pressure.   Pressure is directly proportional to temperature, or higher temperature equals higher pressure .

6. The Combined Gas Law is a gas law that combines the three individual gas laws: Boyle's Law , Charles's Law , and Gay-Lussac's Law . It describes the relationship between the pressure, volume, and temperature of a fixed amount of gas. The Combined Gas Law states that the ratio of the product of pressure and volume to temperature is constant for a given amount of gas. This law is used when all three variables (pressure, volume, and temperature) are changing, and allows you to predict the effect of one variable on the others when certain conditions change.

7. A 10.0 L balloon contains helium gas at a pressure of 1.5 atm and a temperature of 290 K. The balloon is taken outside, where the pressure drops to 1.0 atm, and the volume increases to 12.0 L. What is the final temperature of the helium gas?

8. A 15.0 L cylinder contains oxygen gas at a pressure of 1.2 atm and a temperature of 300 K. The gas is then heated, causing the volume to increase to 20.0 L and the temperature to rise to 350 K. What is the final pressure of the oxygen gas?

9. A 6.0 L container of nitrogen gas is at a pressure of 2.5 atm and a temperature of 280 K. The container is then heated, causing the pressure to increase to 3.0 atm and the temperature to rise to 320 K. What is the final volume of the gas?

10. A gas is contained in a 8.0 L container at a pressure of 2.5 atm and a temperature of 350 K. The gas is then transferred to a new container where the volume decreases to 6.0 L and the pressure increases to 3.5 atm. What is the final temperature of the gas? 2. A gas is contained in a 2.5 L container at 300 K with a pressure of 2.0 atm. If the volume is decreased to 1.5 L and the temperature is raised to 350 K, what is the new pressure of the gas? 3. A 3.0 L container of gas is at a pressure of 4.0 atm and a temperature of 300 K. The gas is then transferred to a new container where the pressure decreases to 2.0 atm and the temperature increases to 350 K. What is the final volume of the gas?