Intermolecular Forces and Properties
Which statement best describes the effect of increasing the temperature on a reaction at equilibrium that has a negative ΔH° (enthalpy change)?
The equilibrium position remains unchanged.
The equilibrium position shifts toward the products.
The reaction rate decreases without shifting the equilibrium.
The equilibrium position shifts toward the reactants.
One assumption made by Kinetic Molecular theory is that gas particles move in __________ motion.
structured
random
predictable
precarious
What happens to the average kinetic energy of the molecules in a sample of gas when the temperature is increased?
It remains constant.
It decreases.
It becomes zero.
It increases.
Which inquiry accurately determines the relationship between pressure and volume when examining deviations from ideality at constant temperatures using real gases?
Measure pressure changes when compressing O₂ at varying temperatures keeping volume constant
Record P-V work done during adiabatic compression for He across variable temperatures
Monitor volume expansion of N₂ upon gradual heating under static pressure conditions
Collect data on PV/nRT ratios over varying pressures for CO₂ at constant temperature to observe deviations from unity
What variable represents the average kinetic energy of the particles in a gas sample in the kinetic molecular theory?
Volume
Pressure
Number of moles
Temperature
What is the shape of an ideal gas particle according to kinetic molecular theory?
Spherical with significant volume.
Point particle with no volume.
Variable shape with negligible volume.
Cube-shaped with definite volume.
Which postulate of the kinetic molecular theory assumes that individual gas particles do not attract or repel each other?
Gas particle size is significant compared to total volume occupied by the gas
The total energy within a closed system remains constant over time
Gas particle motion ceases at absolute zero temperature (-273°C)
Gas particles have no intermolecular forces between them

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Which of the following factors would increase the root mean square speed of gas molecules in a sealed container when considering the kinetic molecular theory and ideal gas law?
Increasing the molar mass of the gas at constant temperature.
Increasing the temperature while keeping volume constant.
Decreasing the number of moles of gas within the container.
Reducing the volume of the container at a constant temperature.
In a closed container, how does increasing the volume affect the pressure exerted by a gas, assuming constant temperature?
The number of collisions with walls increase.
The pressure decreases.
The mass of gas particles increases.
The pressure increases.
According to the ideal gas law, which variable must increase if pressure increases while keeping temperature and volume constant?
Gas constant (R)
Number of moles (n)
Volume (V)
Kelvin temperature (T)