Which of the following best describes a property of water?
2 answers:
Answer: C. Remaining liquid over a wide temperature range
Explanation: Water has a high specific heat i.e it requires a large amount of heat to raise the temperature of 1 gram of water through . This is because the molecules of water are associated through strong hydrogen bonds.
It is also an universal solvent as it can dissolve most of the substances in it due to its high dielectric constant.
The freezing point of water is , that is liquid water converts to solid form at
and the boiling point of water is
, that is liquid water converts to gaseous form at
. Thus it can remain in liquid form over the temperature range of
to
Water has a high surface tension as the molecules of water are held together by strong hydrogen bonds.
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Answer
given,
For helium
Volume,V = 46 L
Pressure,P = 1 atm
Temperature,T = 25°C = 273 +25 = 298 K
R=0.0821 L . atm /mole.K
n₁ = ?
number of moles
we know
P V = n R T
n₁ = 1.89 moles
For oxygen
Volume,V = 12 L
Pressure,P = 1 atm
Temperature,T = 25°C = 273 +25 = 298 K
R=0.0821 L . atm /mole.K
n₂ = ?
number of moles
we know
P V = n R T
n₂ = 0.49 moles
Total volume of tank = 5 L
temperature of tank = 298 K
Partial pressure of helium
P₁ = 9.25 atm
Partial pressure of oxygen
P₂ = 2.39 atm
total pressure
P = P₁ + P₂
P = 9.25 + 2.39
P = 11.64 atm