Question

what is enthalpy and entropy?

Answer 1

Hi..........

Enthalpy may be defined as the energy supplied to the system or gain from the system at constant pressure. Mathematically it is called the sum of internal energy and pressure-volume work.

   H = U + PV

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Entropy may be defined as the measurement of disorderness or randomness in a system. It is denoted by S. For any reversible reaction the change in entropy may be defined as ratio of energy Q and Temperature T.

ΔS = Q/ΔT.

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Answer 2

Hey mate here is your answer:-)

Entropy and Enthalpy are the famous terms related to thermodynamics. Entropy is the measurement of the disorder or the randomness in the system during the chemical process, whereas enthalpy measures the heat change or internal energy change of a system during the chemical reaction under constant pressure. Actually, enthalpy is the measure of total energy in the system, although it always denotes the change in the energy system at constant pressure as it as the total enthalpy of the system can’t be measured. It is measured in joules per kilogram. On the other hand, entropy is the measure of random activity, which is usually the amount of disorder in the system. The SI unit for Entropy (S) is Joules per Kelvin (J/K).

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