Chemistry 1302A/B Chapter Notes - Chapter 2.1: Thermodynamics, Physical Property, Heat Capacity

• School: Western University
• Department: Chemistry
• Course: Chemistry 1302A/B
• Professor: Keith Griffiths

Document Summary

2. 1 - heat, work and energy. Heat always transfers from the warmer object to the cooler object. Part of the universe that one wants to study. Remaining parts of the universe that the system can interact with. System which can exchange both matter and energy with it"s surroundings. Can exchange matter but not energy with it"s surroundings. Can"t exchange matter or energy with it"s surroundings. Amount of heat transferred relative to the temperature difference. Considers the mass of the substance. Heat needed to warm one mass unit of the substance. Endothermic vs. exothermic reactions. When the system absorbs energy from the surroundings. When the system releases energy into the surroundings. When two objects come to one final temperature. The warmer object always gives heat to the colder object. The warmer object loses heat. The colder object gains heat. Therefore q is negative and t is negative. Therefore q is positive and t is positive. Intensive and extensive properties.