Answer: correct option is B. Energy is released by the reaction
Explanation:
The exothermic reactions are the reactions in which energy is released.The released energy can be in the form of heat or light.
Temperature of the surrounding also increases.
For example:
- Neutralization reaction between acid and base.
Above reaction takes place in the aqueous medium.After the reaction mixtures becomes hot.
- Burning of Magnesium ribbon
In above reaction energy is released in the form light.
+molecule size +steepness of the concentration gradient +temperature + steepness of the electric gradient +steepness
Answer:
So copper is a lattice of positive copper ions with free electrons moving between them. ... The electrons can move freely through the metal. For this reason, they are known as free electrons. They are also known as conduction electrons, because they help copper to be a good conductor of heat and electricity.
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Why does copper have such a high electrical conductivity?
Thus, copper is a lattice of positive copper ions with the movement of free electrons among them. Due to movement of electrons freely through the metal, they are also known as conduction electrons. The presence of these conduction electrons makes the copper a good conductor of electricity and heat.
Explanation:
Potassium Iodide or KI is an ionic compound and dissolves to water since the two are polar substances. Like dissolves like. As KI is dissolved into water, the KI molecules dissociates into ions, the K+ and I- ions. Water molecules can stabilize these ions. The K+ ions attracts the negative side of H2O molecules which is the oxygen side while the I- ions attracts the positive side of H2O molecules or the hydrogen side.
In most cases, carbon shares electrons with other atoms (usual valence of 4). This is because carbon typically bonds with elements which have a similar electronegativity. Examples of covalent bonds formed by carbon include carbon-carbon, carbon-hydrogen, and carbon-oxygen bonds