Is humidity a measure of water vapor or brametric pressure

Relative humidity = water vapor content/ water vapor capacity. Stated simply, relative humidity is the ratio of the amount of water vapor in the air to the amount required for saturation at a given temperature and pressure. A relative humidity of 100% means that an air parcel is completely saturated.

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

the answer to your question is c.

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