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Covalent compounds have low melting and boiling points compared to ionics, because they have a weaker bond. They are only sharing electrons rather than completely giving or taking them, so they are not as strongly bonded, therefore they do not need as much thermal energy to break their bonds.
What else can I help you with?
What kind of changes are melting and boiling?
Melting is a phase change where solid becomes a liquid. The latent heat of fusion must be supplied to produce phase change from solid to liquid. About 144 Btu must be supplied to change 1.000 pound of ice at 32 degrees F to 1.000 pound of liquid water at 32 degrees F. Boiling is a phase change where a liquid becomes a vapor. The latent heat of vaporization must be supplied to change a boiling liquid to a vapor. For water boiling at 14.7 psia ,970.3 Btu of heat must be supplied to change 1.000 pound of boiling liquid water to vapor.
What is the effect of pressure on boiling point of butane?
If nonsalt water is placed in a closed system (for example an automotive cooling system) then for every pound of pressure the system can handle (ex. radiator cap) the boiling point of water (normally being 212f) is raised by 3 degrees. Thus, if said system can handle only 1 pound pressure before the water boils the temperature of the water when it boils should be 215F. Or so I understand.
How long to melt a pound of gold?
It would take around 10-15 minutes to melt a pound of gold at a typical melting temperature of 1,948 degrees Fahrenheit. This time can vary based on the efficiency of the melting equipment being used.
What are the physical properties of matter?
Properties that do not change the chemical nature of matter.Physical properties of matter are properties that don't change even if you heat it, freeze it or pound it. For example, Water can be frozen, boiled or crushed and you will still have H2O. Changing their physical shape do not change their chemical makeup. Other examples of physical properties include: color, maleability, luster, ductility and conductivity (heat and electric).
How much grams in a pound?
On Earth, 453.6 grams of mass weigh one pound.
What is melting point of iron powder?
Iron's melting point is 1538 °C (2800 °F or 1811 K) for pure metal (powderish or not)
Does more salt make water boil faster?
Short answer: no, it actually makes it boil slower. Dissolving salt to water lowers its melting point and raises its boiling point by an amount proportionate to moles of salt over kilograms of water. Adding 1.00 pound of salt to 1.00 kg of water raises its boiling point by 7.95 degrees C or 14.3 degrees F
What kind of changes are melting and boiling?
Melting is a phase change where solid becomes a liquid. The latent heat of fusion must be supplied to produce phase change from solid to liquid. About 144 Btu must be supplied to change 1.000 pound of ice at 32 degrees F to 1.000 pound of liquid water at 32 degrees F. Boiling is a phase change where a liquid becomes a vapor. The latent heat of vaporization must be supplied to change a boiling liquid to a vapor. For water boiling at 14.7 psia ,970.3 Btu of heat must be supplied to change 1.000 pound of boiling liquid water to vapor.
A 10 psi radiator cap will raise the boiling point of coolant how degrees Fahrenheit?
the boiling point of the water will raise 3 deg. frht. for every pound of pressure the cap is rated for. a 10lb. cap will raise the boiling temp to 242deg. frht.
What is the effect of pressure on boiling point of butane?
If nonsalt water is placed in a closed system (for example an automotive cooling system) then for every pound of pressure the system can handle (ex. radiator cap) the boiling point of water (normally being 212f) is raised by 3 degrees. Thus, if said system can handle only 1 pound pressure before the water boils the temperature of the water when it boils should be 215F. Or so I understand.
Would a 15 pound radiator cap make a difference from a 14 pound cap?
It will raise your boiling point very slightly, maybe 2 or 3 degrees.
Why does water boil in your reservoir?
Because it's very very hot. OR Is the correct temperature and has not enough pressure upon it to raise it's boiling point. Water's boiling point increases 3 degrees per pound of pressure upon it.
How many btu's in one pound of ice?
It takes about 144 BTUs to melt 1 pound of ice at its melting point of 32°F (0°C) and fully convert it into water at the same temperature.
What would cause pressure on both radiator hoses?
The coolant system has to be under pressure to operate properly. For each pound of pressure the system is able to go 3 degrees above boiling point. Lets use water and water only for this example. Water boils at 212 degrees, if you have a 15 pound radiator cap then you can raise the temperature of the water to 257 degrees. 15 pound cap X 3 degrees per pound equals 45 degrees and add that to the boiling point of 212 degrees. With coolant, the numbers are slightly higher. You can't have pressure on one hose and not the other. It is a closed loop system. So if you have engine with 180 degree thermostat, that is too close to boiling point. Adding the 15 pound cap moves the boiling point to 257 degrees that way you have room to move the temperature up. It is similar to a pressure cooker.
How much is the boiling point of coolant per one pound of pressure?
From the following website. http://www.evanscooling.com/articles/aug98oc.htm Modern cars, like many of those built after 1955, started using pressurized cooling systems. The benefit was that, for every pound of pressure created in the cooling system, the boiling point of the water was raised by three degrees. By sealing up the cooling system, and adding pressure, the boiling point of the water was raised. Then, the engine could be operated at a higher temperature and operated more efficiently. Today, most modern cars use a 16-lb. cap to raise the boiling point 48 degrees higher than the normal 212 degree boiling point.
What could cause a '94 Olds Achieva S v6 to run hot within 15-30 mins of driving?
Cars can not run on just water because water boils at 212 degrees, no matter what. When coolant is mixed with water 50%-50%, the boiling point gets higher. Now,for every pound of pressure this mixture is put under, the boiling point will increase 3 or 4 degrees. So a 15 pound radiator cap can mean a possible 50-60 degree added to the boiling point. Now, a defective cap can decrease your boiling point.Thus a bad cap could be your problem
Break in a lacrosse net?
Use lotion on it and pound it and pound after that put the net in boiling(hot) water and then pound it some more....just keep repeating that and it should work
