The air conditioner Air conditioner work by using ‘evaporative heat'(a phenomenon that absorbs the surrounding heat when the liquid evaporates). The indoor unit suddenly expands the compressed refrigerant through a narrow hole.…
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Formation and energy of the ionic bonds Metal atoms have strong properties to lose electrons and become cations. On the contrary, non-metallic atoms have strong properties to obtain electrons and become anions.…
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Law of Definite Proportions In a reaction where hydrogen gas is burned to produce water, two hydrogen atoms combine with one oxygen atom. That is, hydrogen gas and oxygen gas always react…
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What is Covalent Bond? Covalent bond is a bond formed by atoms, each of atom creates an electron pair and shares it. Because each other’s electrons are shared in pairs, the number…
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Looking through the VR device, you can observe the 3-dimensional molecular bonding structure of ice.
Press the ‘C’ button to add carbon, press the ‘H’ button to add a hydrogen atom, and press the ‘O’ button to add an oxygen atom. The added atoms are randomly placed…
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Surface tension Surface tension is a type of force that acts to minimize the surface of liquids. Molecules inside the liquid are pulling together with other molecules around them. At the surface…
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Paraffin, the main ingredient of candles Paraffin, the main ingredient of candles, is alkane hydrocarbons in which 20 to 40 carbon atoms are linked in a chain. It does not dissolve in…
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Charle’s Law Assuming constant pressure, increasing the temperature of the gas will speed up the molecular motion. As the gas often collides with the vessel wall, the volume increases. Conversely, if you…
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Boyle’s Law If you press the piston of a syringe containing a certain number of gas molecules, the space of the gas molecules is reduced. Therefore, the gas molecules collide with the…
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You can drag ‘start’ and ‘end point’. Thermodynamics of Gas The gas changes its temperature while exchanging thermal energy with the outside, and sometimes does work to outside as it expands or…
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