plz answer all the questions 49 pts no spamming.
Answers
Heyyy
I have answered some of them
1. The boiling point is the temperature at which a material changes from a liquid to a gas (boils)
2. The actual boiling or melting point for any substance depends on the external pressure. A higher pressure will usually raise the boiling point, and, to some extent, the melting point. ... If the pressure is low enough, the liquid phase can no longer exist because the boiling point is below the melting point!
4. the melting point is the temperature at which a material changes from a solid to a liquid (melts).
5. Sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.
7. The heat of fusion, also known as the latent heat of fusion, is a category of latent heat describing the energy for the phase change between a liquid and a solid to occur without a change in temperature.
10. Supercooling, also known as undercooling, is the process of lowering the temperature of a liquid or a gas below its freezing point without it becoming a solid.
11. The temperature of a substances remains constant during melting and boiling even when heat is being supplied to it continuously because the heat that is supplied is being used up in changing a state of matter by overcoming intermolecular force of attraction.
Hope it helps
1)The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid. ... When considered as the temperature of the reverse change from liquid to solid, it is referred to as the freezing point or crystallization point
2)Melting it would increase the volume of that substance because liquids take more space than solids. If you increase the pressure, it becomes harder for that transformation to occur. It's harder to change into a state that needs more volume if you are under pressure! So, you need more energy, hence temperature, to melt.
4) The boiling point of a substance is the temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid and the liquid changes into a vapor. The boiling point of a liquid varies depending upon the surrounding environmental pressure.
5)Sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase
7)The amount of heat energy released or absorbed when a solid changing to liquid at atmospheric pressure at its melting point is known as the latent heat of fusion. ... The latent heat of fusion of water is 79.72 cal/gram (or) 334.0 kJ/