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Zina [86]
3 years ago
15

What changes would occur at a molecular level if a liquid is placed in cool conditions?

Chemistry
2 answers:
Bezzdna [24]3 years ago
5 0

The motion of molecules would decrease at a molecular level if a liquid is placed in cool conditions.

C. The motion of the molecules would decrease.

<u>Explanation:</u>

For the change in the state of matter in a substance, particle movements are responsible. Thus, an increase in motion means high kinetic energy and vice versa. Also, kinetic energy and temperature are directly proportional to each other.  

When a liquid is placed in colder conditions, the particles in it come closer because the motion among molecules decreases at a molecular level. This leads to low kinetic energy among molecules because the temperature is a measure of kinetic energy.

Anon25 [30]3 years ago
4 0

Answer:

I believe the answer is option c. The motion of the molecules would decrease.

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For the reaction N2(g) + O2(g)2NO(g) H° = 181 kJ and S° = 24.9 J/K G° would be negative at temperatures (above, below) K. Enter
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ΔG deg will be negative above 7.27e+3 K.

<u>Explanation:</u>

  • The ΔG deg with the temperature can be found using the formula and the formula is given below
  • ΔG deg = ΔH deg - T ΔS deg
  • Given data, ΔH deg = 181kJ and ΔSdeg=24.9J/K
  • -T ΔS deg will be always negative and ΔG deg = ΔH deg  will  be  positive and ΔG deg will be negative at relatively high temperatures and positive at relatively low temperatures
  • solving the equation and substitute  ΔGdeg=0
  • ΔGdeg = ΔHdeg - T ΔSdeg
  • T= ΔHdeg/ΔSdeg
  • T=181 kJ / 2.49e-2 kJK-1
  • By simplification we get
  • T=7.27 × 10^3 K.
  • Therefore, Go will be negative above   7.27 × 10^3 K
  • Since ΔG deg = -RT lnK, when ΔGdeg < 0, K > 1 so the reaction will have K > 1 above 7.27 × 10^3 K.
  • ΔG deg will be negative above 7.27e+3 K.

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