Chapter 4 Chemistry 9

Auto Added by WPeMatico

Chemistry 9 Lesson 40: Petroleum and natural gas

Chemistry 9 Lesson 40: Petroleum and natural gas a. Physical properties Petroleum is a viscous, dark brown liquid, insoluble in water and lighter than water. b. Natural state and composition of petroleum Oil is in the ground, concentrated into oil fields. Oil fields have 3 layers: Gaseous layer: The main component of the gaseous layer …

Chemistry 9 Lesson 40: Petroleum and natural gas Read More »

Chemistry 9 Lesson 41: Fuel

Chemistry 9 Lesson 41: Fuel 1. Theoretical Summary 1.1. What is fuel? Fuels are combustible substances that give off heat and light when burned. Note: Electricity is a form of energy that can emit light and heat but is not a fuel. 1.2. How are fuels classified? Based on the state, the fuel is divided …

Chemistry 9 Lesson 41: Fuel Read More »

Chemistry 9 Lesson 39: Benzene

Chemistry 9 Lesson 39: Benzene 1. Theoretical Summary 1.1. Physical properties – Liquid, colorless, insoluble in water, lighter than water, soluble in many substances such as cooking oil, rubber candles, iodine. – Benzene is toxic. 1.2. Molecular structure In the CTCT of benzene there are 3 double bonds and 3 alternating single bonds. a) Solid …

Chemistry 9 Lesson 39: Benzene Read More »

Chemistry 9 Lesson 37: Ethylene

Chemistry 9 Lesson 37: Ethylene 1. Theoretical Summary 1.1. Physical properties Ethylene is a gas, colorless, odorless, slightly soluble in water, lighter than air.(d = frac{{28}}{{29}})) 1.2. Molecular structure In an ethylene molecule, each carbon atom is bonded to two hydrogen atoms, the other two valencies bond two carbon atoms together. The structural formula of …

Chemistry 9 Lesson 37: Ethylene Read More »

Chemistry 9 Lesson 38: Acetylene

Chemistry 9 Lesson 38: Acetylene 1. Theoretical Summary 1.1. Physical properties Colorless, odorless gas, slightly soluble in water, lighter than air(d = frac{{26}}{{29}})) 1.2. Structural Formula – Structural formula of acetylene: H – C C – H – Short: ONLY ONLY – In the C . molecule2H2 has a triple bond (C ≡ C). There …

Chemistry 9 Lesson 38: Acetylene Read More »