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Study Guide

CHEM 1210- Midterm Exam Guide - Comprehensive Notes for the exam ( 36 pages long!)

36 Pages

Course Code
CHEM 1210

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[CHEM 1210] Comprehensive spring guide including any lecture notes, textbook notes and exam guides.find more resources at Energy & Heat Friday, January 26, 2018 11:50 AM • Energy Examples of kinetic energy are mechanical energy, light, heat, and ○ electrical energy ○ In chemistry, the most important forms of potential energy are chemical energy and nuclear energy § Chemical energy is stored in chemical substances as, for example, in foods such as carbohydrates and fats § It is given off when substances take part in chemical reactions ○ The law of conservation of energy § Energy can neither be created nor destroyed § Energy can be converted from one form to another ○ Energy: the capacity to do work § May be either kinetic energy or potential energy § The calorie (cal) is the base metric unit of energy ○ Kinetic energy: the energy of random motion § KE = 1/2mv 2 § KE increases as the object's velocity increases § At the same velocity, a heavier object has greater KE ○ Potential energy: the energy an object has because of its position; stored energy • Heat and Temperature ○ Heat is a form of energy ○ Heating refers to he energy transfer process when two objects of different temperatures are brought into contact § Heat energy always flows form the hotter object to the cooler one until the two have the same temperature (thermal equilibrium) § Heat is commonly measured in calories (cal),which is the heat necessary to raise the temperature of 1 g of liquid water by 1 degree C § Calorie is not part of the SI. The official SI unit of heat is the Joule (J), which is about 1/4 of a calorie □ 1 cal = 4.184 J • Specific heat ○ Specific heat (SH): the amount of heat necessary to raise the temperature of 1.00 g of a substance b y 1.00 degrees C find more resources at
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