In an exothermic chemical reaction, the energy gained by the surroundings must be the energy lost by the reaction. a. equal to b. greater than c. less than

Option (A) is the correct answer.

Explanation:

A chemical reaction in which there will be release of heat energy by the reactant molecules is known as an exothermic reaction.

For example,

Also, according to law of conservation of mass energy gained by the reactants will be equal to the amount of energy lost to the surroundings. This is because energy can neither be created nor it can be destroyed but it can only be converted from one form to another.

Thus, we can conclude that in an exothermic chemical reaction, the energy gained by the surroundings must be equal to the energy lost by the reaction.

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electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia