Databases

CODATA Key Values of Thermodynamics
http://www.codata.org/resources/databases/key1.html
Compilation of internationally accepted values for the thermodynamic properties of key chemical substances, proposed by the Committee on Data for Science and Technology (CODATA).

CRC Handbook of Chemistry and Physics
http://www.hbcpnetbase.com/
Data on Thermochemistry, electrochemistry, and kinetics (section 5) and Fluid properties (section 6). Data may be accessed after purchasing a personal or institutional subscription.

F*A*C*T Thermochemical Database
http://www.crct.polymtl.ca/fact/index.php
Very useful database of thermochemical properties.

NIST Chemistry Webbook.
http://webbook.nist.gov/chemistry
Contains databases of thermochemical properties of a large number of substances.

Tutorials

Classical Thermodynamics: First Law
http://theory.ph.man.ac.uk/~judith/stat_therm/node3.html
Brief introduction to the first law.

The First Law of Thermodynamics
http://physics.bu.edu/~duffy/py105/Firstlaw.html
Another web page on thermodynamics with some worked examples.

First Law of Thermodynamics
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/firlaw.html#c1
HyperPhysics page on thermodynamics.

Energetics and Equilibria
http://www-teach.ch.cam.ac.uk/teach/IA/EE_student.pdf
A comprehensive and 'wordy' text on Energetics and Equilibria by Cambridge University. It covers material relevant from Chapters 1-10.