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The molecules in a gas have a higher energy and are moving around more violently than in its liquid form, as a consequence the average distance apart of the molecules is much greater in a gas. To change from a liquid at its boilng point to a gas at its condensation point (i.e. at the same temperature) requires energy Latent(hidden) heat. So for example water at 100 degrees C to change to steam at 100 degrees C requires extra energy to give the molecules energy to move further apart.
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What type of changes occur when water changes from liquid to solid?
When water changes from liquid to solid, it undergoes a phase change called freezing. During this process, water molecules slow down and come closer together, forming a crystalline structure. This change also leads to a decrease in energy and a release of heat.
What happens when a physical reaction occurs?
During a physical reaction, the arrangement of atoms and molecules changes, but no new substances are formed. This means that the chemical composition remains the same before and after the reaction. Examples of physical reactions include changes in state (solid to liquid, liquid to gas) or changes in shape.
Does a chemical change occur when a substance changes phase?
No, a change in phase is a physical change, not a chemical change. In a phase change, the substance's state changes (solid, liquid, gas) due to differences in temperature or pressure, but the chemical composition remains the same.
Which physical and chemical change occur when LPG comes out of the cylinder and burns?
When LPG comes out of the cylinder, it changes from a liquid to a gas which is a physical change. When it burns, it undergoes a chemical change where it reacts with oxygen to produce heat, light, carbon dioxide, and water vapor.
What is the differences of a chemical change and a physical change?
Chemical changes occur when the elements, their valences, and their amounts change. 4H + O2 => 2H2O is a chemical change because the valences change from unfilled to shared. Physical changes occur when the material phase changes. In fact, in 4H + O2 => 2H2O we also have a physical change...from gas to liquid water (in most cases). NOTE: That there was a chemical change here is incidental, the phase change is the physical change.
What are two kinds of changes that occur in matter?
The two types of changes in matter that it goes through is physical change and chemical change... trust me, we are learning this at school.
Does physical change occur when energy is added or removed?
Physical change can occur when energy is added or removed. For example, adding heat energy can cause water to change from a solid to a liquid (melting), while removing heat energy can cause water to change from a liquid to a solid (freezing). These changes do not alter the chemical composition of the substance.
Does melting occur when a substance changes from a liquid to a solid?
This change in the state of matter (liquid to solid) is called freezing, not melting; it is a physical change, the chemical nature of the molecules is not changed.
What conditions does physical change occur in materials?
Physical changes in materials occur when the material undergoes a change in its physical properties without any change in its chemical composition. Examples of conditions that can cause physical changes include changes in temperature, pressure, or exposure to light or electricity. Physical changes can include changes in state (such as melting or freezing), changes in shape or size, or changes in properties (such as conductivity or solubility).
What type of change occur when water changes from a solid to a liquid?
its a phase change
What type of changes occur when water changes from liquid to solid?
When water changes from liquid to solid, it undergoes a phase change called freezing. During this process, water molecules slow down and come closer together, forming a crystalline structure. This change also leads to a decrease in energy and a release of heat.
Which occurs more often on earth physical changes or chemical changes?
Physical changes occur more often on Earth compared to chemical changes. Physical changes involve alterations in the state or appearance of matter without changing its chemical composition. Examples include changes in shape, size, or state of matter (solid, liquid, gas). Chemical changes involve the formation of new substances with different chemical properties.
What happens when a physical reaction occurs?
During a physical reaction, the arrangement of atoms and molecules changes, but no new substances are formed. This means that the chemical composition remains the same before and after the reaction. Examples of physical reactions include changes in state (solid to liquid, liquid to gas) or changes in shape.
Is baking cake a physical change or chemical change?
Baking a cake involves both physical and chemical changes. Physical changes occur when the cake batter changes form (such as turning from a liquid to a solid). Chemical changes occur when the ingredients react with each other during baking, leading to the formation of new substances that give the cake its flavor and texture.
When ice changes to water the link up of atoms does or does not change?
The bonds between hydrogen and oxygen atoms of individual water molecules do not change when liquid water changes to ice. This is a physical change called freezing, and does not cause any chemical changes to occur. Only chemical changes can cause changes in chemical bonds.
Does a chemical change occur when a substance changes phase?
No, a change in phase is a physical change, not a chemical change. In a phase change, the substance's state changes (solid, liquid, gas) due to differences in temperature or pressure, but the chemical composition remains the same.
Which physical and chemical change occur when LPG comes out of the cylinder and burns?
When LPG comes out of the cylinder, it changes from a liquid to a gas which is a physical change. When it burns, it undergoes a chemical change where it reacts with oxygen to produce heat, light, carbon dioxide, and water vapor.
