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What else can I help you with?
What substance has a density less than 1 gmL?
For example ice and lithium.
When does a substance changes from a solid to a liquid?
A substance changes from a solid to a liquid at the substance's melting point. This is a different temperature for every substance. For example, water (ice) melts at 0oC, whereas gold melts at 1,064oC.
Is it true a physical change never alters the form or appearance of a substance?
No, a physical change can alter the form or appearance of a substance without changing its chemical composition. For example, melting ice changes its form from solid to liquid without altering its chemical composition.
How can the temperature of substance remain the same even if the substance is absorbing thermal energy.?
For example, when ice is melting, the absorbed thermal energy is used to change the phase of the substance - a type of potential energy.
What cause a substance to change it state example ice to water?
Most commonly, either the addition or removal of heat
Is dry ice a substance?
Yes, dry ice is a substance. It is frozen carbon dioxide.
Is ice a mixture or a pure substance?
Ice is solid H2O so it is a pure substance, at least ideally.
What tempereture make solid to liquid?
Depends on what substance. For example, Ice which is a solid, liquifies above 0 degrees Celsius
Is the melting point of a substance is the same as it's surroundings?
no this would depend on the atoms of the substance. for example if you have a block of ice and a block of butterthe block of ice would melt faster because its atoms move more faster to heat than butter does
Is melting ice example of chemical property?
No, melting ice is a physical change because it does not involve a change in the chemical composition of the substance. Chemical properties describe how a substance reacts with other substances to form new substances.
When a substance melts the temperature of the substance?
it decreases.
When a substance from any state of matter to another is called a?
This is called a change in the physical state of the substance. For example formation of ice from water is a change in the physical state of water.
