The 2 types of chemical reactions are exothermic and Endothermic reactions . In situation of exothermic reactions, energy is released during the form of heat , light or sound . Exothermic reactions may well come spontaneously . Endothermic reaction is a single which need to absorb energy in to proceed . Endothermic reactions cannot arrive spontaneously. Work should be done in to get these reactions to come. When endothermic reactions absorb energy , a temperature drop is measured during the reaction. Photosynthesis is an instance of an endothermic chemical reaction and in this program (reaction) plants use the energy from the sun to convert carbon dioxide and water into glucose and oxygen . This reaction requires 15MJ of energy (sunlight ) for every kilogram of glucose which is produced. Sunlight 6CO2 (g H2O (l C6H12O6 (aq 6O2 (g)
An illustration of an exothermic reaction is the mixture of sodium and chlorine to yield table salt . This reaction produces 411 kJ of energy for each mole of salt that is certainly produced.
Na (s 0 .5Cl2 (s NaCl (s)
Figure : Energy Diagram
In endothermic reactions the reactants have a lower energy level than the solutions. The difference in between these a couple of energy levels is the energy gained inside the surroundings in the reaction. In an exothermic reaction , reactants have a greater energy level than the products and solutions. The difference between these a couple of energy levels is the energy released for the surroundings inside reaction. Normally some extra energy is required to obtain the reaction to begin . That is referred to as the activation energy.
2 . List the Three types of radioactive decay , and describe how the energy /particles are emitted in of lowest to highest energy.
Radioactive Decay: Many nuclei are radioactive and hence they're unstable , and will eventually decay by emitting a particle, transforming the nucleus into another nucleus , or into a lower energy country . A chain of decays takes location until a stable nucleus is reached . During radioactive decay , principles of conservation apply and they are conservation of energy, conservation of momentum (linear and angular conservation of charge and conservation of nucleon amount .There are 3 well-known forms of radioactive decay, alpha, beta, and gamma.
Figure : Penetration Ability of alpha , beta and gamma.
Alpha decay: In alpha decay, the nucleus emits an alpha particle an alpha particle is basically a helium nucleus, so it 's a group of a couple of protons and 2 neutrons. A helium nucleus is incredibly stable. Alpha particles don't travel far in air just before getting absorbed this makes them really safe for use in smoke detectors, a well-known house item. An illustration of an alpha decay involves Uranium-238 Beta Decay: A beta particle is always an electron, but can also be a positron, a positively-charged particle that is certainly the anti-matter equivalent from the electron . If an electron is involved, the variety of neutrons inside the nucleus decreases by...
Alpha decay: In alpha decay, the nucleus emits an alpha particle an alpha particle is basically a helium nucleus, so it 's a group of a couple of protons and 2 neutrons. A helium nucleus is incredibly stable. Alpha particles don't travel far in air just before getting absorbed this makes them really safe for use in smoke detectors, a well-known house item. An illustration of an alpha decay involves Uranium-238 Beta Decay: A beta particle is always an electron, but can also be a positron, a positively-charged particle that is certainly the anti-matter equivalent from the electron . If an electron is involved, the variety of neutrons inside the nucleus decreases by...
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