Grade 12 Chemistry Exam Questions and Answers, Exams of Advanced Education

Download Grade 12 Chemistry Exam Questions and Answers and more Exams Advanced Education in PDF only on Docsity! Grade 12 Chemistry Exam Questions and Answers Thermochemistry - correct answer-Branch of chemistry that studies the energy chamges in chemical reactions. Thermal Kinetic Energy - correct answer-Motion of particles (either atoms or molecules). Chemical Potential Energy (CPE) - correct answer-Stored energy in the bonds between atoms in a molecule. Three types of motions of particles - correct answer-1. Vibration 2. Rotation 3. Translation Temperature - correct answer-The average kinetic energy of the particles in a substance. Thermal Energy - correct answer-The total kinetic energy of the particles in a substance due to their motion. What does thermal energy depend on? - correct answer-1. The amount of moles- the more particles there are the greater the thermal energy. 2. The speed (temperature)- the faster the particles are moving, the greater the thermal energy. Heat (Q) - correct answer-The transfer of thermal energy from a HOT object to a COLD object. System - correct answer-All of the chemical components that are involved in a chemical reaction (the reactants, the products and whatever solvents they are in). What are the 3 systems? - correct answer-1. Open System- exchange both matter and energy with its surrounding. 2. Closed System- exchange energy but not matter with its surrounding. 3. Isolated System- no exchange for matter or energy with its surrounding. Surroundings - correct answer-Everything outside of the system we are studying. What does the total amount of chemical potential energy depend on? - correct answer- 1. The number of bonds- the more bonds a molecule has, the more energy it can store.