Research shows that students frequently use the term chemical change to describe changes in physical state. Freezing and boiling are considered to be examples of chemical reactions.
Give reason : Freezing of water to ice and evaporation … – Toppr
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Is Freeze physical or chemical?
Freezing is a physical change. It involves a liquid changing states to a solid. Thus, freezing a substance will not change its chemical identity, but its state.
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Why is freezing called a physical change?
No new substance is formed during the melting of ice, only a change of state (from solid to liquid) takes place during the melting of ice. So, the melting of ice (to form water) is a physical change. So, the freezing of water (to form ice) is a physical change.
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Why is freezing a chemical change?
If the liquid water solidifies into ice, then it undergoes a physical change, not a chemical change. In a chemical change, you cannot alter the substance into its original state because it already has a new identity and composition.
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What type of chemical reaction is freezing?
Change of State If heat is removed from a substance, such as in freezing and condensation, then process is exothermic.
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Is freeze a physical property?
Physical properties are characteristics of a substance. They do not change. Physical properties include color, smell, freezing/melting point, and density.
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Is freezing a chemical?
Freezing is not a chemical reaction, but is a phase (or physical) change.
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Why freezing is a physical change?
(d) Because it does not change chemical composition of cloth and the change is only in the state, size, shape, colour, texture or the smell of some or all of the substances that undergo physical change.
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Why is freezing a physical change?
When liquid water (H2O) freezes into a solid state (ice), it appears changed; however, this change is only physical, as the composition of the constituent molecules is the same: 11.19% hydrogen and 88.81% oxygen by mass. (Public Domain; Moussa). Physical changes can further be classified as reversible or irreversible.
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How is water freezing a physical change?
If the liquid water solidifies into ice, then it undergoes a physical change, not a chemical change. In a chemical change, you cannot alter the substance into its original state because it already has a new identity and composition.
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Is freeze a physical property?
Physical properties are characteristics of a substance. They do not change. Physical properties include color, smell, freezing/melting point, and density.
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Is freezing a chemical?
Freezing is not a chemical reaction, but is a phase (or physical) change.
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Why freezing is a physical change?
(d) Because it does not change chemical composition of cloth and the change is only in the state, size, shape, colour, texture or the smell of some or all of the substances that undergo physical change.
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What chemical change is freezing?
When liquid water (H2O) freezes into a solid state (ice), it appears changed; however, this change is only physical, as the composition of the constituent molecules is the same: 11.19% hydrogen and 88.81% oxygen by mass.
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What type of process is freezing?
Freezing is almost always an exothermic process, meaning that as liquid changes into solid, heat and pressure are released. This is often seen as counter-intuitive, since the temperature of the material does not rise during freezing, except if the liquid were supercooled.
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Is ice freezing a chemical reaction?
Freezing is not a chemical reaction, but is a phase (or physical) change.
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What is freezing of reaction?
Freezing refers to the phase change of a substance from the liquid state to a solid-state. This is a phase change phenomenon which means that a substance is transformed from one state of matter to another state.
