You are calculating DE in a chemistry problem. What if you confuse the system and the surroundings? How would this affect the magnitude of the answer you calculate? The sign?
Lecture3:Moles&QuantumMechanics Sunday,September 17,2017 4:01PM TheMole • Avogadro'sNumber=6.022x10 23particles • SIunitofamount 12.0gcarbon,countingat1billionatomspersecond.Howlongwouldittaketoreach amoleofcarbon 23 ▯▯▯▯ ▯▯▯ ▯ 6.022x10 atomsx⎯▯▯ ▯▯▯▯▯⎯⎯⎯▯.▯▯▯▯▯ ▯▯▯10 MoleRelationships • Atomicmass=gram/mol • Whatisthemassof3molofaluminum ▯▯▯ 3molx ⎯⎯⎯⎯ = 81.0 ▯▯▯▯ ClassicalMechanics QuantumMechanics • Normalmechanics • Motion&interactionatatomiclevel • Howtheworldfunctions• Electrons'location&energies • Newtonian • Wave:disturban