Question

How does the law of the conservation of energy relate to the First Law of Thermodynamics.

Answer 1

Explanation:

The first law of thermodynamics also known as the law of conservation states that “Energy can neither be created nor destroyed, but it can be changed from one form to another.”

Example: Plants convert the radiant energy of sunlight to chemical energy through photosynthesis. We eat plants and convert the chemical energy into kinetic energy while we swim, walk, and breathe.

Any of several concepts that require a measurable aspect of a closed system to remain constant when the system changes, such as conservation of charge and conservation of energy. The principles of symmetry can be directly linked to conservation laws.

The first law of thermodynamics:

1. The first law of thermodynamics states that although energy cannot be generated or destroyed, it can change its form.
2. An organism's intrinsic energy never changes.
3. The system's energy gain and the environment's energy loss are always equal.
4. The change in internal energy $\left(\Delta U\right)$ is always equal to the sum of the change in heat of the system $\left(\Delta Q\right)$ work done by the system $\left(\Delta W\right)$.

$\Delta U=\Delta Q+W$

Law of conservation of energy:

According to the law of conservation of energy, energy can only be converted from one form of energy to another and cannot be created or destroyed. In other words, unless energy is added from outside, a system always has the same amount of energy. In the case of non-conservative forces, where energy changes from mechanical energy to thermal energy, yet the overall energy does not change, this is particularly puzzling. Energy must be converted from one form to another in order to be used.

Therefore, the following equation can be used to calculate the quantity of energy in any system:

$U_T=U_i+W+Q$

1. The total internal energy of a system is known as $U_T$.
2. The initial internal energy of a system is called $U_i$.
3. $W$ is the job that the system does or has done.
4. $Q$ is the heat that is brought into or taken out of the system.

It is also possible to determine the change in internal energy of the system using the equation: $\Delta U=W+Q$
This is also a statement of the first law of thermodynamics

Diagram of the law of conservation: