CHEM 001 Lecture Notes - Lecture 8: Heat Capacity, Calorimetry, Internal Energy

• School: College of The Sequoias
• Department: Chemistry (CHEM)
• Course: CHEM 001
• Professor: guerra

Document Summary

Energy can be transferred between objects or from one form to another. Solar panels convert light energy to electrical energy. State functions only depend on initial and final conditions, not the pathway between them. Internal energy, enthalpy, entropy, mass, altitude, and density. Path functions - only heat and work. Internal energy (e) - a system"s total amount of ke and pe. E reaction = e products - e reactants. * last two relate to the first law of thermodynamics. Heat (q) - energy transfer due to temperature difference. Specific heat capacity (c) - the energy required to raise 1 g of a substance by 1 c. H2o has a high specific heat (4. 18 j/ c x g) Fluids do work via volume change according to this formula. The system is often a fluid- filled piston or balloon. When a fluid expands (+ v), work is negative. When a fluid compresses (- v), work is positive.