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ssjsike

7+ Year Member
May 17, 2010
26
2
Status
Pre-Medical
A. Liquids are always more stable than gases or solids
B. A higher vapor pressure indicates a lower heat of vaporization.
C. As the pressure on a liquid increases, the temperature of the liquid decreases.
D. Fluid pressure is equal at all points in a liquid.

The answer is B.

I realize that A and C are wrong, but doesn't D correlate to Pascal's Law? What would make that choice wrong in comparison to choice B?
 
May 28, 2011
510
2
Status
Pre-Health (Field Undecided)
A. Liquids are always more stable than gases or solids
B. A higher vapor pressure indicates a lower heat of vaporization.
C. As the pressure on a liquid increases, the temperature of the liquid decreases.
D. Fluid pressure is equal at all points in a liquid.

The answer is B.

I realize that A and C are wrong, but doesn't D correlate to Pascal's Law? What would make that choice wrong in comparison to choice B?
D is true only for an ideal liquid. But that's making an assumption. B is true for all liquids because higher vapor pressure means weaker intermolecular bonds, so more interaction with the atmosphere. Hence, you'd require less energy to vaporize that liquid. And this property would be applicable to all liquids, as demanded by the question stem.
 
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Jul 3, 2011
19
1
Status
Pre-Medical
D is wrong because of Pascal's laws. A point deeper in the liquid will experience a greater weight of liquid.
 
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