What is thermodynamics law of energy?

Question

Law of energy!! Is related to science and technology, now explain the similarities between science and technology

Answer 1

It simply states that energy can neither be created nor be destroyed...it can be transformed from one form to another...this is also called as law of conservation of energy

Answer 2

Law of energy is almost same everywhere either it is optics or thermodynamics. Only the difference is the different kinds of energy.

In thermodynamics energy is in the form of heat .

According to thermodynamical law of energy if some energy say dQ is given to a system and dW is the work done by the system or on the system and dU is the change in internal energy then dU =dW +dQ                  .......(1)

Work done on the system is +ve 

Work done by the system is −ve 

If we apply a pressure P due to which there is change in volume say dV then 

dW=PdV 

So equation ..(1) becomes

dU= PdV  +dQ 

Answer 3

The thermodynamic law of energy is the first law of thermodynamics which states that energy can not be created or nor be destroyed ,but it can only transfer from one place to another .

           The genrealy form of law of conservation of energy is :

E total = KE system + PE system + U system

Answer 4

The First law of thermodynamics also known as Law of Conservation of Energy states that energy can neither be created nor destroyed, energy can only transferred or changed from one form to another. For example. Turning on a light would seem to produce energy. However, it is electrical energy that is converted.

This law says that there are two kinds of processes, heat and work, that can lead to change in the internal energy of a system. Since both heat and work can be measured and quantified, this is the same as saying that any change in the energy of a system that can change in the energy of a system must result in a corresponding change in the energy of the surroundings outside the system. In other words, energy cannot be created or destroyed. If heat flows into system or the surroundings do work on it, the internal energy increases and the sign of q and w are positive. Conversely, heat flow out of system or work done by the system will be at the expense of internal energy and q and w will therefore be negative.

Answer 5

The first law of thermodynamics, also known as the law of energy conservation, states that energy cannot be created or destroyed, only transferred or converted from one form to another.

Answer 6

The First Law of thermodynamics is a formulation of the law of conservation of energy, adapted for thermodynamic processes. A simple formulation is: "The total energy in a system remains constant, although it may be converted from one form to another."