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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To solve this problem we will apply the energy conservation theorem for which the work applied on a body must be equivalent to the kinetic energy of this (or vice versa) therefore
Here,
m = mass
= Velocity (Final and initial)
First case) When the particle goes from 10m/s to 20m/s
Second case) When the particle goes from 20m/s to 30m/s
As the mass of the particle is the same, we conclude that more energy is required in the second case than in the first, therefore the correct answer is A.