Calculate the change in entropy that occurs in the system when 1.90 mol of methanol (ch3oh) vaporizes from a liquid to a gas at its boiling point (64.6∘c).for methanol, δhvap = 35.21 kj/mol.

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

Stage in which a star’s outer layers have started to cool and grow outward?