quiz 4 - Name: Instructions: Qz4 Multiple Attempts: Not...

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

View Full Document Right Arrow Icon
Name: Qz4 Instructions: Multiple Attempts: Not allowed. This Test can only be taken once. Force Completion: This Test must be completed now. It cannot be resumed later. Question 1 Multiple Choice 2 points Calculate the H-Br bond enthalpy given the standard enthalpies of formation for HBr(g), H(g), and Br(g), -36.2, 218, and 112 kJ.mol -1 , respectively. 320 kJ.mol -1 366 kJ.mol -1 124 kJ.mol -1 284 kJ.mol -1 196 kJ.mol -1 Question 2 Multiple Choice 2 points The highly exothermic thermite reaction, in which aluminum reduces iron (III) oxide  to elemental iron, has been used by railroad repair crews to weld rails together.  2Al( s ) + Fe 2 O 3 ( s  2Fe( s ) + Al 2 O 3 ( s H  = -850 kJ  What mass of iron is formed when 725 kJ of heat are released?  47 g 65 g 95 g 130 g Question 3 Multiple Choice 2 points Calculate the lattice enthalpy of calcium oxide from the following data.  enthalpy of formation of Ca(g): +178 kJ.mol
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

quiz 4 - Name: Instructions: Qz4 Multiple Attempts: Not...

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