What effect will the number of particles and temperature have on the rate of diffusion of gas molecules?
a.
the rate of diffusion decreases with the increase in number of particles and temperature.
b.
the rate of diffusion increases with the increase in number of particles and temperature.
c.
the rate of diffusion increases with the increase in number of particles and decrease in temperature.
d.
the rate of diffusion decreases if the number of particles and temperature are kept constant.
e.
the rate of diffusion increases if the number of particles and temperature are kept constant.

B

Explanation:

Diffusion involves the movement of particles of a gas. They possess a kinetic energy which depends on the temperature of the gas. Increasing the temperature of the gas implies increasing the average kinetic energy of the molecules of the gas. If moregas molecules are present and their kinetic energy is increased by increasing the temperature, the rate of diffusion will definitely increase. Hence the answer.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.