Might be a "Duh" question to a boffin but, can water be hotter than 100c and not boil at 1 atmosphere.

Question

see mickey D`s coffee is mad hot. Is it possible to heat water to more than 100 C in standard kettle or pan .Once it is boiling does it get any hotter. If so how hot?

Answer 1

It is possible. Its called superheating. See the referred link.

Answer 2

No it isn't possible. Man there are a lot of ignorant people answering. Waters mineral or coffee content has only a small effect on boiling point ( typically less than 1 degree).

At approximately 100c liquid water reaches its boiling point at which it will undergo a phase change to gaseous water. Water can not be heated to a higher temperature unless it is held at a higher pressure than 1 atm.

You can force it to change to a gas quicker by applying more heat, but it isn't due to an increase in temperature, just an increase in applied heat energy.

Answer 3

yes, water can be heated to above 100 C (or 212 F.) , but it must be free of impurities(not bottled "Spring" water, it must be distilled. To try this, place a cup of ordinary tap water and a cup of distilled water in a microwave oven. Heat until the tap water is boiling then remove both cups. Very carefully, drop a sugar cube into the distilled water. Stand back because it will boil instantly(and very explosively)

Answer 4

Yes, it can be done with an ULTRA clean glass and DISTILLED water.

Heat in a microwave - can get to maybe up to102 degrees without boiling..

If you then dump, say, instant coffee into the cup of water it will practically explode as the bubble form around the particles.

VERY dangerous...... a marginally less dangerous one - is just to drop a spoon into the water....

Time for gloves, apron & goggles....

Answer 5

The reason water boils is due to the trace element of impurities naturally occuring there. If the water is 100% PURE it will not boil and will get hotter.

Answer 6

Water isn't water at 100 degrees, it is changing state at 99.999999.... You can heat the liquid if it has impurities like coffee to a higher temp.
But no, water cannot go above 100, but 99 is still 'boiling' hot

Answer 7

If you have very pure water in a super clean container, it can superheat to temps above 100 C. Chemists often use "boiling" chips in their beakers, which will make water boil at the "correct" temp.

But hot coffee?? I don't think so. It's not pure enough, nor is the pot clean enough.

Answer 8

ive got a recolection from school that boiling point for water is less than 100, i may be wrong, but coffee is definatly burnt by boiling water, makes it bitter. anyway I thought you were the "font of all wisdom"
you got me thinking so I searched WWW, the boiling point of water is dependant on the altitude when it is being heated... and it obviously stops being water at a point and becomes steam.

Answer 9

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Answer 10

Water can boil at over 100 degrees and not turn to steam. To acieve this you have use a pressure cooker. water will then boil at 121oC thats why you have soft bones in you sardines and McDonalds coffee scald your lips.

Answer 11

Under pressure. But some coffee heated in a microwave can be hotter, and actually erupt from the cup if disturbed!!