Question
Gas pressure within a fixed container will increase when _____.
gas volume changes
mass of a gas is increased
gas is cooled
gas is heated
gas volume changes
mass of a gas is increased
gas is cooled
gas is heated
Answers
GPT-4o mini
Gas pressure within a fixed container will increase when the **mass of a gas is increased** or when the **gas is heated**.
1. **Mass of a gas is increased**: Adding more gas molecules to a fixed volume increases the frequency of collisions between gas molecules and the walls of the container, resulting in higher pressure.
2. **Gas is heated**: Increasing the temperature of the gas increases the kinetic energy of the molecules, causing them to collide with the walls of the container more forcefully and frequently, which also raises the pressure.
On the other hand:
- **Gas volume changes** (if the volume were to decrease) would increase pressure, but this statement does not clarify that the volume is changing in that way.
- **Gas is cooled**: This generally decreases the kinetic energy of the molecules, leading to a decrease in pressure if the volume remains constant.
In summary, the two correct scenarios leading to increased pressure in a fixed container are increasing the mass of the gas and heating the gas.
1. **Mass of a gas is increased**: Adding more gas molecules to a fixed volume increases the frequency of collisions between gas molecules and the walls of the container, resulting in higher pressure.
2. **Gas is heated**: Increasing the temperature of the gas increases the kinetic energy of the molecules, causing them to collide with the walls of the container more forcefully and frequently, which also raises the pressure.
On the other hand:
- **Gas volume changes** (if the volume were to decrease) would increase pressure, but this statement does not clarify that the volume is changing in that way.
- **Gas is cooled**: This generally decreases the kinetic energy of the molecules, leading to a decrease in pressure if the volume remains constant.
In summary, the two correct scenarios leading to increased pressure in a fixed container are increasing the mass of the gas and heating the gas.