Question

State :-
a) The law of conservation of mass .
b) The law of conservation of energy.
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Answer 1

Answer:

$\huge\mathbb\fcolorbox{Purple}{pink}{⭐Answer⭐}$

In physics and chemistry, the law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed. Wikipedia

In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time.

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Answer 2

$\huge\underline\mathfrak{\star Answer:-}$

$\underline\mathtt\purple{a)\: Law\ of \: Conservation\: of \: Mass:-}$

➢ The law of conservation of mass states that,

“The mass in an isolated system can neither be created nor be destroyed but can be transformed from one form to another”.

➢According to the law of conservation of mass, the mass of the reactants must be equal to the mass of the products for a low energy thermodynamic process.

➢Formula of Law of Conservation of Mass

Law of conservation of mass can be expressed in the differential form using the continuity equation in fluid mechanics and continuum mechanics as:

∂ρ∂t+▽(ρv)=0

Where,

• ρ is the density
• t is the time
• v is the velocity
• ▽ is the divergence

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$\underline\mathtt\purple{b)\: Law\ of \: Conservation\: of \: Energy:-}$

➢The law of conservation of energy states that energy can neither be created nor be destroyed. Although, it may be transformed from one form to another. If you take all forms of energy into account, the total energy of an isolated system always remains constant. All the forms of energy follow the law of conservation of energy.

➢In brief, the law of conservation of energy states that,

"In a closed system, i.e., a system that is isolated from its surroundings, the total energy of the system is conserved."

➢The amount of energy in any system is determined by the following equation:

$U_T$= U₂ +W+Q

• UT is the total energy of a system
• Ui is the initial energy of a system
• Q is the heat added or removed from the system
• W is the work done by or on the system

➢The change in the internal energy of the system is determined using the equation

$\triangle$U=W+Q

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