Table of Contents
What happens when you add heat?
When you add heat to a substance, you are adding energy. When heat (energy) goes into a substance one of two things can happen: The molecules now, on average, have more kinetic energy. This increase in average kinetic energy is registered as a number called temperature that changes proportionally with it.
What happens when heat is removed from a substance?
Heat going into a substance changes it from a solid to a liquid or a liquid to a gas. Removing heat from a substance changes a gas to a liquid or a liquid to a solid.
How when heat is added to a substance such as water the substance at times changes temperature and at other times does not change temperature?
For instance, when water is boiling, adding heat does not increase its temperature. This happens at the boiling temperature of every substance that can vaporize. In this case, the energy added to the liquid goes into breaking the bonds between the liquid molecules without causing the temperature to change.
What is it called when heat is added to a substance but the temperature of the substance does not increase?
For instance, when water is boiling, adding heat does not increase its temperature. This happens at the boiling temperature of every substance that can vaporize. At the boiling temperature, adding heat energy converts the liquid into a gas WITHOUT RAISING THE TEMPERATURE.
Why is heat applied to a substance to change its temperature or make it change its phase?
If heat is coming into a substance during a phase change, then this energy is used to break the bonds between the molecules of the substance. The heat is used to break the bonds between the ice molecules as they turn into a liquid phase.
Do particles expand when heated?
All three states of matter (solid, liquid and gas) expand when heated. Heat causes the molecules to move faster, (heat energy is converted to kinetic energy ) which means that the volume of a gas increases more than the volume of a solid or liquid.
How do particles react when heated?
When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.
When heat is removed from a solid what happens to the particles?
If heat is removed from a substance, such as in freezing and condensation, then the process is exothermic. In this instance, heat is decreasing the speed of the molecules causing them move slower (examples: liquid to solid; gas to liquid). These changes release heat to the surroundings.