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12 Cards in this Set
- Front
- Back
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List the intermolecular forces, in descending order of strength.
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Ion-ion
Hydrogen bonding Dipole-dipole London dispersion |
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Surface tension
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Net inward pull of a liquid
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Cohesion
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Forces that bind the same substance together
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Adhesion
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Forces that bind different substances together
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What are the factors affecting viscosity?
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1) As IM forces increase, so does viscosity
2) Longer chain-like molecules are more viscous 3) As temp. increases, viscosity decreases |
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Are the following cooling or warming processes?
1) evaporation 2) condensation 3) boiling |
1) cooling
2) warming 3) cooling |
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What is the effect of pressure on boiling?
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Boiling bubbles can only exist if their pressure equals atmospheric pressure. Otherwise, they will collapse.
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Equilibrium vapor pressure
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The pressure at which the rate of condensation equals the rate of evaporation
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What is the amount of energy necessary to cause a phase change dependent on?
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The size and strength of the IM forces
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What unique characteristics does hydrogen bonding give water?
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1) High boiling point
2) High melting point 3) Strong surface tension |
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What is the effect of increasing molecular mass on the melting and boiling points?
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As M increases, the mp and bp increase due to increased London forces (more electrons)
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Why is the heat of vaporization so much higher than the heat of fusion?
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It requires more energy to separate particles than to allow translation and rotation
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