In which type of chemical reaction is heat absorbed from the surroundings? endothermic irreversible reversible decomposition disintegration

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

Which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes

What happens to the average kinetic energy of a gas when the particles of the gas collide against each other at a constant temperature and volume? explain your answer.