Chemical reactions that require a net input of energy are: * incomplete endothermic exothermic spontaneous The Sl unit for energy is * O pascal O mole O joule O watt When excess heat is released during a chemical reaction, the energy term appears * O as a product, and AH is positive O as a product, and AH is negative O as a reactant, and AH is negative O as a reactant, and AH is positive

in each box circle the phrase that is consistent with the second law of thermodynamics

Some of the following sources listed are currently used, while others might be more feasible in the future with more research.  Fossil fuels Nuclear energy Biofuels Wind energy Solar energy You will research how the energy is extracted or produced and try to be very detailed about the process and the chemistry involved (stating equations and reactions). You will also research the impact on the environment when using or producing fuels.   Investigating fossil fuel: How is it produced? What is the chemistry involved (stating equations and reactions)? What is the impact on the environment? Investigating nuclear energy: How is it produced? What is the chemistry involved (stating equations and reactions)? What is the impact on the environment? Investigating biofuel: How is it produced? What is the chemistry involved (stating equations and reactions)? What is the impact on the environment? Investigating wind energy: How is it produced? What is the chemistry involved (stating equations…

What distinguishes solids, liquid and gases is that O atoms move fastest in gases, slower in liquids and are rigidly connected in solids atoms move fastest in solids, slower in liquids and they are rigidly connected in gases Othe temperature of gases is always higher the temperature of solids is higher because they have more energy QUESTION 9 Two atoms of the same element O always have the same number of neutrons and protons O always have the same number of protons but can have different numbers of neutrons O always have the same number of electrons and protons O(a) and (c) QUESTION 10 We know that atoms of different elements combine to form molecules of compounds like table salt and water. What makes these bonds possible is the number of protons the number of electrons the electric force that attracts electrons and protons the electric force that attracts the neutrons from two different atoms

QUESTION 27 The chief advantage of traditional (kerosene) rocket propellant is that     it is the cheapest type of rocket fuel     it can be stored as a gas, making it lighter and easier to transport     it ignites spontaneously when subject to high enough pressures     it has the highest exhaust velocity of any rocket fuel