melting point

Types of heat of reactions (enthalpies)

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When the reactants of a chemical reaction are completely reacted to form products, then the heat evolved or absorbed is called the heat of reactions. Heat of reactions are of various types depending upon the nature of reaction. It must be defined for one mole. The various types of heat of reactions are as follows: … Read more

Comparison between white phosphorous and red phosphorous

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S.N Properties White phosphorous Red phosphorous 1. Colour Light yellow Red 2. Smell Light garlic Smelless 3. Physiology Poisonous Non-poisonous 4. Conductivity Bad conductor Semiconductor 5. Density 1.81 g/cm3 2.1 g/cm3 6. Melting point 44ºc 500ºc 7. Ignition temperature 30ºc 240ºc 8. Phosphorescence Glows up in dark Does not glow in dark 9. Solubility in … Read more