Lecture 10 notes (exam 2 review)

3 262009 energyunits caloriecal originally

Info iconThis preview shows page 1. Sign up to view the full content.

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

Unformatted text preview: d weakly away from magnetic fields. With unpaired e-: Unpaired spins point in the same direction (Hund’s rule). Magnets add. The atom is paramagnetic. • attracted to magnetic fields. 1s22s22p63s23p64s23d104p4 1s22s22p63s23p64s23d104p35s1 If individual atom-magnets line up in a bulk sample A ferromagnet - a permanent magnet. 3 2/6/2009 Energy Units calorie (cal) Originally: “The energy needed to heat of 1g of water from 14.5 to 15.5 °C.” Now: 1 cal = 4.184 J (exactly) Conservation of Energy “Energy can neither be created nor destroyed” E can only change form. Total E of the universe is constant. Dietary Calorie (Cal) - the “big C” calorie Used on food products. 1 Cal = 1000 cal = 1 kcal Also called the 1st Law of Thermodynamics Systems, Surroundings & Internal Energy Energy, Temperature and...
View Full Document

This note was uploaded on 03/02/2014 for the course CHEM 101 taught by Professor Multipleprofs during the Spring '07 term at Drexel.

Ask a homework question - tutors are online