Heat
This substance is water, which melts at 0 degrees Celsius and boils at 100 degrees Celsius under normal atmospheric pressure.
When a substance melts or boils, it absorbs heat energy from the surroundings in order to overcome the intermolecular forces holding its particles together. This energy is used to break these forces and allow the particles to move more freely, transitioning from a solid to a liquid (melting) or from a liquid to a gas (boiling).
Chromium
Water melts at 0oC, and boils at 100oC.
Sulphur melts at 115.21oC and boils at 444.6oC.
68 degrees
The substance is a gas because its boiling point is lower than its melting point, indicating that it transitions from solid to gas without passing through the liquid phase.
it decreases.
it decreases.
Ice will melt before mercury boils. Ice melts at 0 degrees Celsius while mercury boils at 356.7 degrees Celsius.
Steam condences into water, water freezes in to ice, ice melts into water, water boils to steam
Nickel