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What type of change occurs when water changes from a solid to a liquid?
A Chemical Change
A physical Change
A Irreversible change
Which of the following will cause a decrease in a gas pressure in a closed container?
decreasing size of container
Adding more gas
Adding more heat
Raising the temperature of a gas will increase its pressure if the volume of the gas
and the number of particles increase
is increased but the number of particles is constant
and the number of particles are constant
is constant but the number of particles is increased.
The temperature and volume in a closed container of gas will remain constant. If the number of particles of a gas is increased, the gas pressure will?
cause a decrease in the average kinetic energy of the particles
Which of the following factors do NOT affect the pressure of an enclosed gas?
Number of particles
Type of substance
When water vapor loses heat it becomes?
When gas goes directly into a solid it is called?
When water releases heat it becomes a ?
Collisions of helium atoms and the walls of a closed container cause?
a decrease in volume
A overall loss of energy
Which of the following phase changes is an endothermic change?
Which of the following phase changes is an exothermic change?
When liquid changes to gas it is called?
A(an) _________________________ has definite volume and a definite shape.
Materials can be classified as solids, liquids and gases based on whether their shapes and ______________ are definite.
The shape remains constant when it is moved from one container to another. This material is a ?
The motion of one particles of a gas in unaffected by the motion of other particles of a pas unless the particles?
The pascal is the SI unit for ?
What happens to temperature during phase change?
When liquid begins to cool, kinetic energy?
When ice absorbs heat it becomes a ?
Ninety Nine percent of all the matter that can be observed in the universe exists as?
What is the result of a force over an area?