CHEM 1210 Lecture Notes - Lecture 2: Significant Figures, Kinetic Energy, Electric Potential

• School: Ohio State University
• Department: Chemistry
• Course: CHEM 1210
• Professor: Shiyu Zhang

Document Summary

Extensive properties: depend on the amount of substance present. Example: mass (measured by a balance) and volume (measured by glassware, ruler, or meterstick) Intensive properties: do not depend on the amount of substance present. It is not an exact number of ml of water: the last digit of the measurement is the uncertain value. Precision vs accuracy: accuracy is how close you are to a true value, precision refers to how close measurements are to each other. Rounding: if the digit beyond the last desired place is 5 or larger, round up, if less than 5, round down. Addition, subtraction, multiplication, and division with significant figures: Addition and subtraction: the result will have the same number of significant figures as the measurement with the lowest number of decimal places (not total significant figures) Multiplication and division: the result will have the same number of significant figures as the measurement with the lowest number of significant figures (not just decimals)