chem 102 sample test 1

chem 102 sample test 1 - Chemistry 102 Virginia...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chemistry 102 Virginia Commonwealth University Summer 2007 Hour Exam 1 (100 pts) Name:_________________________ Multiple Choice (5 pts ea) 1) Which one of the following molecules has a net dipole moment? a) NH 3 b) SO 3 c) CO 2 d) XeF 2 2) What is the correct order of the following compounds, in terms of increasing boiling point? a) He<HF<CH 4 <C 2 H 6 b) He<CH 4 <C 2 H 6 <HF c) CH 4 <He<HF<C 2 H 6 d) HF<He<CH 4 <C 2 H 6 3) Ether has P vap = 400 mm Hg at 17.9C, and a normal boiling point of 34.6C, what is the heat of vaporization, H vap , for ether, in kJ/mol? a) 28.6 kJ/mol b) 3.44 kJ/mol c) 101.8 kJ/mol d) 0.349 kJ/mol 4) Liquids have a positive Hvap, meaning the vaporization of a liquid is endothermic and energetically unfavorable, yet liquids vaporize spontaneously at normal temperatures and pressures, why? a) Svap is negative and therefore vaporization is entropically favored....
View Full Document

Page1 / 3

chem 102 sample test 1 - Chemistry 102 Virginia...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online