Question 2 8 marks What is the predominant intermolecular force that must be

Question 2 8 marks what is the predominant

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Question 2. (8 marks) What is the predominant intermolecular force that must be overcome as a) solid CO2sublimes b) CHCl3boils c) ice (H2O) melts Which one of the above molecules should have the highest boiling point? Question 3. (6 marks) Ethanol (C2H5OH) melts at -114C and boils at 78C. The enthalpy of fusion of ethanol is 5.02 kJ/mol, and its enthalpy of vaporization is 38.56 kJ/mol. The specific heats of the solid and liquid ethanol are 0.97 J/g-K and 2.3 J/g-K, respectively. How much heat is required to convert 75.0 g of ethanol at -120C to the liquid phase at 25C?
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6Question 4 (6 marks). A unit cell consists of a cube that has an ion of element “L” at each corner, an ion of element “M” at the center of the cube, and an ion of element “O” at the center of each face. Write the formula of the compound, and explain how you determined it. Question 5. (8 marks) Correctly assign the IUPAC name to the following hydrocarbons and circle the molecule that should be added to gasoline to improve its octane rating. H3CCH2CH2CH2CH2CH2CH2CH2CH2CH2CH3H3CCH2CHCH2CH2CH2CH3CH3H3CCCH2CHCH3CH3H3CCH3
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7DATA SHEET PV=nRT DsolvsolvsoPP=χlnsolutesolvsolvsolvnnn+=χdQkQU21=mRTurms3=w = F x d E = q + w H = E + PV H = qp.)(.)(reactHnprodHnHffrxn=DDDTnCqp=q = nH
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  • Fall '10
  • KRISTA
  • Enthalpy, Ion, Intermolecular force, a. b. c., b. c. d., H H C H H C H H C H H C H OH H H C H O H C H H C H H C H H H H C H H C H O H C H H C H H

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