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Particles come in many, many shapes and sizes, and can be solid particles or liquid droplets. The size of particles is directly linked to their potential for causing heath problems. Traditionally, the environmental sciences have divided particles into two main groups and these two groups are different in many ways. PM10 is particles between 2.5 and 10 microns (micrometers) in diameter (a human hair is about 60 micron in diameter). PM2.5 is particles smaller than 2.5 microns. The PM10 and PM2.5 measurements you might have seen reported, by the EPA for example, refer to the total weight of the particle found. This is a holdover from when the available technology had difficulty detecting individual particles. More modern monitoring equipment, such as that used in clean room monitoring, count and size individual particles. The Dylos DC1100 is this more modern type of device and counts individual particles in two size ranges which will roughly correlate to PM2.5 and PM10.
There is more than size that is different in these types of particles. Each type of particle has different material compositions and can come from different places. The smaller the particle the longer it can remain suspended in the air before settling. PM2.5 can stay in the air from hours to weeks and travel very long distances because it is smaller and lighter. PM10 can stay in the air for minutes to hours and can travel shorter distances from hundreds of yards to many mile because it is larger and heavier ...
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What does the latent heat of fusion represent?
The energy required to melt a substance. (Apex)
What do we call the amount of energy required to change from a liquid to a solid?
The amount of energy required to change from a liquid to a solid is called the heat of fusion. This energy is needed to disrupt the intermolecular forces holding the particles in a liquid state and rearrange them into a solid structure. It is also known as the latent heat of fusion.
How can you tell if the rate of evaporation equals the rate of condensation?
When the rate of condensation of the gas becomes equal to the rate of evaporation of the liquid or solid, they are said to be in an equilibrium state. The amount of gas, liquid or solid no longer changes in this state.
When a substance freezes what causes the liquid phase to change into the solid phase?
When a substance freezes, the molecules slow down and come together, forming a regular pattern that locks them into a solid structure. This process releases energy in the form of heat, causing the temperature to decrease.
When solid and liquid phases are in equilibrium which phase solid or liquid contain the greater amount of energy?
The answer depends on the specifics of the question. The idea though, is that when they are in equilibrium, both the solid and the liquid should have the same amount of energy PER MOLECULE. The fact that there is a solid component and a liquid component means that either the solid is melting or the liquid is freezing. In most situations, that means that the temperature of the whole mixture is constant. Another idea is that the energy in the molecules can either be kinetic or potential energy. Basically, the more kinetic energy PER MOLECULE an object has, the higher the object's temperature. Furthermore, the more potential energy PER MOLECULE that the object has, the further apart the molecules are from each other. Combining these ideas, here are a few possible answers to your question. 1. There is more solid than liquid. On average, the solid's molecules have the same kinetic energy as the liquid. The solid, having more molecules, has more kinetic energy total. The liquid has more potential energy in total. The solid has more overall energy. 2. There is more liquid than solid. On average, the liquid's molecules have the same kinetic energy as the solid. The liquid, having more molecules, has more kinetic energy total. The liquid also has more potential energy in total. The liquid has more overall energy. 3. There are equal amounts of liquid and solid. On average, the liquid's molecules have the same kinetic energy as the solid. The liquid has equal kinetic energy as the solid due to the even split. The liquid also has more potential energy in total. The liquid has more overall energy. These three are the main possibilities, and as can be seen in the details, the answer depends on the relative amounts of liquid and solid.
What is the amount of heat to change liquid into solid at constant temperature?
To change a liquid into solid at constant temperature, an amount of heat is released equal to the latent heat of that liquid. For water it is about 80 calories per gram.
Does 1 pound of liquid equal 1 pound of solid?
The pound is a unit of weight, so anything that weighs one pound, regardless of whether it is a solid, a liquid, or anything else, has the same weight.
Why does solid body weigh more in air than when immersed in a liquid?
the buoyant force of the liquid on the solid is more than the buoyant force of the air on the solid.
What weighs more a pound of solid or a pound of liquid?
they both weigh one pound
What does latent heat of fusion represents?
The amount of heat energy required to solid substance solid into a liquid state without any changes in temperature ______________________ Apex: The amount of energy required to turn a mole of a solid into a liquid
Time that takes matter to go from a solid to a liquid and from a liquid to a gas?
Any amount of time
What planet's water resources (solid gas or liquid) might be close to the amount on Earth?
liquid
What does the latent heat of fusion represent?
The energy required to melt a substance. (Apex)
What happens if density of a solid substance is more than liquid it is placed?
If the density of a solid substance is greater than that of the liquid it is placed in, the solid substance will sink to the bottom of the liquid. This occurs because objects with higher density will displace an equal volume of the lower density liquid, causing the solid to sink.
What affects the amount of solid a liquid will hold?
A soild as more mass
Do you need the same amount of energy to change a liquid to a gas as you do to change a solid to a liquid?
No, totally independent
What do we call the amount of energy required to change from a liquid to a solid?
The amount of energy required to change from a liquid to a solid is called the heat of fusion. This energy is needed to disrupt the intermolecular forces holding the particles in a liquid state and rearrange them into a solid structure. It is also known as the latent heat of fusion.
