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What is needed for the molecules in a solid state to change into the liquid state?
In order for molecules in a solid state to change to a liquid state, the substance needs to be heated. An increase in temperature causes more molecular movement (this leaves more space between each molecule) which results in what we see as the physical change from solid to liquid and then eventually liquid to gas.
How does ocean water become less dense?
The motion of molecules in matter increases with temperature. Molecular collisions in a warmer state have more energy than the collisions in a cooler state, tending to increase the volume and therefore reduce the density for a fixed mass.
What kind of change such as a change of state the substance of the whole changes but its underlying structure remains the same?
In changes in which the molecular structure of a substance remains constant, such as changes of state, we often refer to these changes as Physical Changes. If the molecular structure is altered it would be a Chemical Change.
How does an increase in temperature account for the fact that substances change state?
An increase in temperature changes the state because it melts it
What is this change in oxidation state called?
This change is called oxidation (increase of ox. state) or reduction (decrease)
Which change in state involves a decrease in molecular motion?
Condensation
Which state of matter has the least molecular motion?
The solid state has the least molecular motion.
How does matter physically change when it changes its phase or state?
Its motion changes speed on the molecular level
What is a change in the state of motion evidence of?
A change in the state of motion of an object indicates that a force has been applied to it. It accelerates in response, and this appears as a change in its state of motion. It may speed up, slow down, or change direction in response to the applied force.
What state of matter has the greatest molecular motion?
Gas
A change of state is a type of what change?
A change of state is a molecular change.
How molecular motion changes as a substance changes from one state to another?
Molecular motion is less constrained in liquid than in solid and is less constrained in gas than in liquid.
What can change the state of rest or motion of an objec?
Force, can change the state of motion through acceleration a=Force/m.
What does it take to change an objects state of motion?
it takes an unbalanced force to change an object's state of motion
What is the property of a body that requires force to change its state of motion?
property of a body that requires force to change its state of motion
How particles change as they change state from gas to liquid?
Decreasing temperature reduce the speed of gas particles then their inter molecular forces increase,particles come close to each other and become liquid
What is needed for the molecules in a solid state to change into the liquid state?
In order for molecules in a solid state to change to a liquid state, the substance needs to be heated. An increase in temperature causes more molecular movement (this leaves more space between each molecule) which results in what we see as the physical change from solid to liquid and then eventually liquid to gas.
