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Physical Chemistry
Physical Characteristics of Gases
Aristotle viewed matter as being made up of _______, earth, ______, and ________. It wasn’t until Robert ___________ studied gases and proposed matter is made up particles called __________.
Aristotle viewed matter as being made up of _______, earth, ______, and ________. It wasn’t until Robert ___________ studied gases and proposed matter is made up particles called __________.
Physical Chemistry
Pressure is known as the _________ per area on a _____________. Imagine squeezing a balloon. All the pressure that is felt is due to the _______________ of the gas particles that are moving around and bouncing off the ________ of the balloon. The SI unit for pressure is Pascal (____), however _________________ (atm) is used most frequently.
Physical Chemistry
Physical Characteristics of Gases
Aristotle viewed matter as being made up of _______, earth, ______, and ________. It wasn’t until Robert ___________ studied gases and proposed matter is made up particles called __________.
Aristotle viewed matter as being made up of _______, earth, ______, and ________. It wasn’t until Robert ___________ studied gases and proposed matter is made up particles called __________.
Physical Chemistry
Pressure is known as the _________ per area on a _____________. Imagine squeezing a balloon. All the pressure that is felt is due to the _______________ of the gas particles that are moving around and bouncing off the ________ of the balloon. The SI unit for pressure is Pascal (____), however _________________ (atm) is used most frequently.
Physical Chemistry
With the following gas law problems, identify the variables that are changing and then identify the gas law equation to use. Make sure you set up the problem properly and solve for the unknown.
1. If you initially have a gas with a pressure of 0.95 atm and a temperature of 35C and heat it to 65C, what will the new pressure be if volume and moles are held constant?
Gas law: _______________
2. A sealed balloon filled with air has an internal pressure of 1.25 atm and a volume of 2.50 L. If the temperature remains constant at 25C, but the volume is compressed to 1.20 L, what would be the resulting pressure?
Gas law: _______________
3. How many moles of gas are sealed inside the balloon in question #2?
Gas law: ________________
4. A sample of nitrogen gas has a volume of 13.5 L at 32C and 2.5 atm. What is the volume when the pressure changes to 1.3 atm, when temperature is constant?
Gas law: ________________
1. If you initially have a gas with a pressure of 0.95 atm and a temperature of 35C and heat it to 65C, what will the new pressure be if volume and moles are held constant?
Gas law: _______________
2. A sealed balloon filled with air has an internal pressure of 1.25 atm and a volume of 2.50 L. If the temperature remains constant at 25C, but the volume is compressed to 1.20 L, what would be the resulting pressure?
Gas law: _______________
3. How many moles of gas are sealed inside the balloon in question #2?
Gas law: ________________
4. A sample of nitrogen gas has a volume of 13.5 L at 32C and 2.5 atm. What is the volume when the pressure changes to 1.3 atm, when temperature is constant?
Gas law: ________________
Physical Chemistry
With the following gas law problems, identify the variables that are changing and then identify the gas law equation to use. Make sure you set up the problem properly and solve for the unknown.
1. If you initially have a gas with a pressure of 0.95 atm and a temperature of 35C and heat it to 65C, what will the new pressure be if volume and moles are held constant?
Gas law: _______________
2. A sealed balloon filled with air has an internal pressure of 1.25 atm and a volume of 2.50 L. If the temperature remains constant at 25C, but the volume is compressed to 1.20 L, what would be the resulting pressure?
Gas law: _______________
3. How many moles of gas are sealed inside the balloon in question #2?
Gas law: ________________
4. A sample of nitrogen gas has a volume of 13.5 L at 32C and 2.5 atm. What is the volume when the pressure changes to 1.3 atm, when temperature is constant?
Gas law: ________________
1. If you initially have a gas with a pressure of 0.95 atm and a temperature of 35C and heat it to 65C, what will the new pressure be if volume and moles are held constant?
Gas law: _______________
2. A sealed balloon filled with air has an internal pressure of 1.25 atm and a volume of 2.50 L. If the temperature remains constant at 25C, but the volume is compressed to 1.20 L, what would be the resulting pressure?
Gas law: _______________
3. How many moles of gas are sealed inside the balloon in question #2?
Gas law: ________________
4. A sample of nitrogen gas has a volume of 13.5 L at 32C and 2.5 atm. What is the volume when the pressure changes to 1.3 atm, when temperature is constant?
Gas law: ________________
Physical Chemistry
Gas Laws
Which gas laws have a DIRECT relationship with one another?
1. _______________________
2. _______________________
Which gas laws have an INDIRECT relationship with one another?
1. _______________________
2. _______________________
Overview
Complete the following statements and refer to the relationship among the various factors.
- If volume increases, pressure______________, which leads to ________ collisions.
- If volume decreases, pressure ______________, which leads to ________ collisions.
- If temperature increases, the number of collisions ______________, which leads to ________________ volume.
Which gas laws have a DIRECT relationship with one another?
1. _______________________
2. _______________________
Which gas laws have an INDIRECT relationship with one another?
1. _______________________
2. _______________________
Overview
Complete the following statements and refer to the relationship among the various factors.
- If volume increases, pressure______________, which leads to ________ collisions.
- If volume decreases, pressure ______________, which leads to ________ collisions.
- If temperature increases, the number of collisions ______________, which leads to ________________ volume.
Physical Chemistry
Gas Laws
Volume and Moles
When temperature and pressure are held constant, volume and the number of particles (moles) have a ______________ relationship, meaning the more ______________ there are, the greater the _________________. This relationship is referred to as _________________ law.
Pressure and Moles
The number of collisions among the particles and walls of the container depend on the _______________________ inside the container. The more particles there are, the _____________ number of collisions, which means ____________ pressure. The number of particles (moles) and pressure have a ______________ relationship. This relationship is referred to as _____________ law.
Volume and Moles
When temperature and pressure are held constant, volume and the number of particles (moles) have a ______________ relationship, meaning the more ______________ there are, the greater the _________________. This relationship is referred to as _________________ law.
Pressure and Moles
The number of collisions among the particles and walls of the container depend on the _______________________ inside the container. The more particles there are, the _____________ number of collisions, which means ____________ pressure. The number of particles (moles) and pressure have a ______________ relationship. This relationship is referred to as _____________ law.
Physical Chemistry
Gas Laws
Temperature and Pressure
Temperature measures the average ___________ energy of particles, so the higher the temperature, the ___________ the particles will move. The faster they move, the more ___________ that will occur. Temperature and pressure are ________________ relationship, meaning as one ______________ the other _________________. This relationship is referred to as ___________________ law.
Temperature and Volume
Think about how a hot-air balloon expands when hot air is forced into the balloon space. Temperature and volume have a ______________ relationship, meaning as one ______________ the other _________________. This relationship is referred to as _____________ law.
Temperature must be represented in ____________, so there are no negative temperatures.
Temperature and Pressure
Temperature measures the average ___________ energy of particles, so the higher the temperature, the ___________ the particles will move. The faster they move, the more ___________ that will occur. Temperature and pressure are ________________ relationship, meaning as one ______________ the other _________________. This relationship is referred to as ___________________ law.
Temperature and Volume
Think about how a hot-air balloon expands when hot air is forced into the balloon space. Temperature and volume have a ______________ relationship, meaning as one ______________ the other _________________. This relationship is referred to as _____________ law.
Temperature must be represented in ____________, so there are no negative temperatures.
Physical Chemistry
Gas Laws
There are 4 factors that can affect the way a gas behaves.
1. ______________
2. Pressure
3. ______________
4. Number of particles
Pressure and Volume
Pressure of a gas is caused by the ____________ of the moving gas particles when they hit the walls of the container. Pressure and volume have an ________________ relationship, meaning as one ______________ the other _________________. This relationship is referred to as _____________ law.
Boyle’s Law: P1V1 = P2V2
If the volume (size) of a container were to decrease, what would happen to the pressure and the number of collisions? _______________________________________ ____________________________________________________________
There are 4 factors that can affect the way a gas behaves.
1. ______________
2. Pressure
3. ______________
4. Number of particles
Pressure and Volume
Pressure of a gas is caused by the ____________ of the moving gas particles when they hit the walls of the container. Pressure and volume have an ________________ relationship, meaning as one ______________ the other _________________. This relationship is referred to as _____________ law.
Boyle’s Law: P1V1 = P2V2
If the volume (size) of a container were to decrease, what would happen to the pressure and the number of collisions? _______________________________________ ____________________________________________________________
