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It's a pressurized system. When it exceeds cap release pressure, it comes out.
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∙ 11y ago
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Why does the water in a car radiator sometimes boil explosevly when the radiator cap is removed?
Water under pressure has a higher boiling point, if the water is already hot enough to boil it will suddenly erupt when the cap is removed and pressure relieved.
Why does water in a radiator not boil until 110 degrees is reached?
Water boils at 100 degrees C. Using a radiator cap, the system holds pressure, raising the boiling point (Just like your grandmother's pressure cooker). Using the correct coolant mix of water and antfreeze also raises the boiling point.
Can you boil the water at room temperature?
yes,at room temperature by decreasing the pressure we can boil the water.
Why does the water in a car radiator sometimes boils explosivebly when the radiator cap is removed?
Water boils at 212F at Sea level pressure, 14.5 psi or so. If the pressure is increased, so is the boiling point. This is how a pressure cooker cooks with water at up to 500 degrees, and how a nuclear reactor can heat water to almost 3000 degrees, without boiling. Also, water will boil at room temperature or less, if you reduce the pressure, such as applying a vacuum pump to the container. When you open that radiator cap, it causes a drastic change in pressure, a drop. If the water is only warm, just under 200F, say, it will likely just boil violently. If it is above the normal boiling point, that pressure was all that was keeping it liquid. This violent change from liquid to gas is known as flashing. It changes states of matter, and releases a huge and violent amount of energy. This flash is what turns the turbines in power plants, by the way.
Does water boil the same at sea level as it does at higher elevations?
Due to lower atmospheric pressure at altitude, water will boil at lower temperature.
Why does the water in a car radiator sometimes boil explosevly when the radiator cap is removed?
Water under pressure has a higher boiling point, if the water is already hot enough to boil it will suddenly erupt when the cap is removed and pressure relieved.
Does the water in the radiator reach a boil?
Water in a car radiator does not normally boil. In some old cars, the cooling systems would run at about 220 degrees Fahrenheit. The pressure would be high enough so that the water would boil at 250 degrees. Today, you do not put water in radiators but coolant. It is much more efficient than water for cooling engines.
Will a bad radiator cap cause excessive pressure that will cause the coolant to boil off instead of circulating through the engine?
No. Excessive pressure will not cause the water to boil off quickley. It will cause the radiaor hose or other components to burst causing loss of coolant. A bad radiator cap can cause high or low pressure; low pressure will cause the coolant to boil at a lower temperature.
Why does water in a radiator not boil until 110 degrees is reached?
Water boils at 100 degrees C. Using a radiator cap, the system holds pressure, raising the boiling point (Just like your grandmother's pressure cooker). Using the correct coolant mix of water and antfreeze also raises the boiling point.
Can you boil the water at room temperature?
yes,at room temperature by decreasing the pressure we can boil the water.
Why does water boil when the vapor pressure is equal to atmospheric pressure?
Because while atmospheric pressure is the greater of the two the vapour pressure of the water can not spontaneously form bubbles (ie boil).
Can water boil as hot as 800 degrees Fahrenheit?
No. Water boils at 212 F. The boiling cools it and keeps it from getting hotter than that. Water can be put under pressure and heated higher than 212, but it does not boil while it is heated under pressure. That is why car modern can radiator caps are pressure caps.
Can boiling points of liquids be altered by pressure?
yes they can like water if you remove all the pressure form a vial and have water in it the water will boil at room temp. while if you add pressure to water it is harder to boil.
Does water boil at 220?
At standard pressure pure water boil at 100 0C or 212 0F.
Why wont the water boil after it has reached its boiling point?
If water is under pressure at all, which could be based on what the atmospheric pressure is, it will not boil at its prescribed temperature.
Why does water bubble up through your expansion tank coming off your radiator and the engine gets very hot?
That is happening because you have a leak somewhere in the system and it is not allowing it to build pressure. when there is no leaks it would not boil over because the pressure in the system would in a way compress the water from becoming a vapor. and that pressure can be getting lost threw a crack in the radiator, a hole in a hose, a loose hose, a bad radiator cap pressure seal, or a crack in the block.
Why does plain water boil faster then salt water?
A liquid boils when the vapor pressure of the liquid is equal to the atmospheric pressure. The presence of salt in the water reduces the vapor pressure of the water at the temperature at which plain or distilled water will boil. Since the temperature of the salt water must be higher to reach the same vapor pressure as the atmosphere, it takes longer to boil.
