Which statement correctly describes the relationship between the volume of a gas and its temperature, in Kelvin, assuming pressure is held constant?(1 point)
Responses
The relationship is inversely proportional; as temperature increases, volume increases in the same way.
The relationship is inversely proportional; as temperature increases, volume increases in the same way.
The relationship is inversely proportional; as temperature increases, volume decreases in the same way.
The relationship is inversely proportional; as temperature increases, volume decreases in the same way.
The relationship is directly proportional; as temperature increases, volume increases in the same way.
The relationship is directly proportional; as temperature increases, volume increases in the same way.
The relationship is directly proportional; as temperature increases, volume decreases in the same way.
The correct answer is:
The relationship is directly proportional; as temperature increases, volume increases in the same way.
Which statement explains the molecular changes that occur in an enclosed gas as the pressure increases and the temperature is held constant?(1 point)
Responses
An increase in pressure causes particles to move closer together, decreasing the volume.
An increase in pressure causes particles to move closer together, decreasing the volume.
An increase in pressure causes particles to move farther apart, decreasing the volume.
An increase in pressure causes particles to move farther apart, decreasing the volume.
An increase in pressure causes particles to move closer together, increasing the volume.
An increase in pressure causes particles to move closer together, increasing the volume.
An increase in pressure causes particles to move farther apart, increasing the volume.
The correct answer is:
An increase in pressure causes particles to move closer together, decreasing the volume.
The ideal gas law is represented by PV=nRT . As volume is held constant and the temperature increases, how would the pressure be expected to change?(1 point)
Responses
It would become zero.
It would become zero.
It would increase.
It would increase.
It would remain constant.
It would remain constant.
It would decrease.
The correct answer is:
It would increase.
When the pressure of a gas decreases, which quantity will increase, assuming all other variables are held constant?(1 point)
Responses
n
n
T
T
R
R
V
The correct answer is:
V
Two balloons hold two different gases. The gases are held at the same pressure, volume, and temperature. Which quantity can differ between the two gases?(1 point)
Responses
the mass of each gas
the mass of each gas
the molar volume of each gas
the molar volume of each gas
the number of moles of each gas
the number of moles of each gas
the gas constant of each gas
The correct answer is:
the number of moles of each gas
The correct statement that describes the relationship between the volume of a gas and its temperature, assuming pressure is held constant, is:
The relationship is directly proportional; as temperature increases, volume increases in the same way.
To understand why this is the correct statement, we can refer to the gas laws, specifically the ideal gas law, which states: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.
When pressure is held constant, the equation simplifies to: V/T = constant.
This equation shows that the volume (V) is directly proportional to the temperature (T). This means that as the temperature of a gas in Kelvin increases, the volume of the gas also increases in the same way.
Therefore, the correct statement is: The relationship is directly proportional; as temperature increases, volume increases in the same way.