How is one kg mass defined in SI system

Iflow from a warmer object to a cooler object until both objects are the same temperature what am i?

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.

The amount of heat required to change liquid water to vapor at its boiling temperature is 2256 kj/kg. the amount of heat required to change liquid mercury to its vapor state at its boiling temperature is 295 kj/kg. one kg of each substance is currently at its boiling point. how will the amount of thermal energy required to change each substance from a liquid to a gas differ?