# Tag Info

5

When two quantities of water ($m_1$ and $m_2$) at different temperatures (resp. $T_1$ and $T_2$) are mixed in adiabatic conditions (no heat loss and no external heating during mixing) the temperature $T$ of the resulting mixture can be calculated from the heat balance (no heat is lost or added so the heat contained in both masses is found again in the ...

4

What is the possibility water being the fuel to fire. "Pure water" Especially your emphatic addition of "Pure water" allows to answer this question in the narrow sense of the question as: 'No'. In order for a substance to be the fuel to a fire it has to contain something that is reducible, i.e. capable of lowering its Oxidation Number. Such a ...

3

The pressure is caused by the weight of the water above. The compressibility (or lack thereof) of water is irrelevant to the pressure. Try this experiment. Put your hand on the table. Now put a brick on your hand and feel the pressure. Then add a second, third, etc brick. You will feel the pressure increase, but you will not see the bricks being ...

3

Yes, if a water fire extinguisher is used inappropriately, on (say) something like a Magnesium fire. The Magnesium extracts the Oxygen from the water and the Hydrogen then burns. This is in addition to what is effectively a steam explosion from the heat alone spreading the burning metal. Such a fire is a danger when machining Magnesium or similar metals and ...

2

As stated above, the mass of the whole system (sugar + water) doesn't change. In addition, with "ideal" mixing, the total volume of the water plus the total volume of the sugar equals the total volume of the mixture. However, this is not a sure bet, and there are many cases of a volume of one material mixed with a different volume of water, and the total ...

1

The mass doesn't change at all, it will be just the sum of the water mass and the mass Added, what happens is the change of density because the mixture, in general the molecules get closer to each other ( through the intermolecular forces) and, this way, the volume become lower to the same mass quantity, what increase the density by the equation  \rho = ...

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