1. Sodium reacts with chlorine gas to form sodium chloride (salt). If you have 40L of chlorine gas at STP, how many grams of salt would be formed? (209 g) 2. Potassium chlorate decomposes to form potassium chloride and oxygen gas. If you have 250 g of potassium chlorate, how many grams of potassium chloride do you end up with? (152 g)

3. Sulfuric acid reacts with potassium hydroxide to form water and potassium sulfate. If you end up with 50 ml (remember, that has a mass of 50 g) of water, how many grams of sulfuric acid did you start with? (136 g)

4. Hydrogen gas reacts with silver oxide to form water and silver. If you end up with 200 g of silver, how many liters of hydrogen gas at STP did you start with? (20.7 L)

5. Nitrogen gas reacts with hydrogen gas to form ammonia (NH3) at STP. If you had 30L of nitrogen gas, how many grams of ammonia are formed? (45.6 g)

What kind of reactions are 1-5 (S, D, SR, or DR)

explanation:

the largest database of organic compounds lists about 10 million substances, which include compounds originating from living organisms and those synthesized by chemists. the number of potential organic compounds has been estimated at 1060—an astronomically high number. the existence of so many organic molecules is a consequence of the ability of carbon atoms to form up to four strong bonds to other carbon atoms, resulting in chains and rings of many different sizes, shapes, and complexities. the simplest organic compounds contain only the elements carbon and hydrogen, and are called hydrocarbons. even though they are composed of only two types of atoms, there is a wide variety of hydrocarbons because they may consist of varying lengths of chains, branched chains, and rings of carbon atoms, or combinations of these structures. in addition, hydrocarbons may differ in the types of carbon-carbon bonds present in their molecules. many hydrocarbons are found in plants, animals, and their fossils; other hydrocarbons have been prepared in the laboratory. we use hydrocarbons every day, mainly as fuels, such as natural gas, acetylene, propane, butane, and the principal components of gasoline, diesel fuel, and heating oil. the familiar plastics polyethylene, polypropylene, and polystyrene are also hydrocarbons. we can distinguish several types of hydrocarbons by differences in the bonding between carbon atoms. this leads to differences in geometries and in the hybridization of the carbon orbitals.

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.

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