Thermodynamics first law

Answer 1

The first law of thermodynamics states that in any thermodynamic process, when heat Q is added to a system, this energy appears as an increase in the internal energy stored in the system plus the work done by the system on it's surroundings.

or to shorten that, energy can neither be created nor destroyed, but it can change from one form to another

i hope this helped ^^

Answer 2

Conservation of Energy

The first law of thermodynamics is essentially that energy cannot be created or destroyed, but only transferred into or out of a system. Stated in other terms:

The increase in the internal energy of a thermodynamic system is equal to the amount of heat energy added to the system, less any energy expended or transferred (as through work).

For example, if a cold object is put in contact with a hot object, the hot object will transfer heat (energy) to the cold one. The amount of energy lost by the hot object is equal to the amount of energy gained by the cold one.

Answer 3

the first law of thermodynamics also known as the law of the conservation of energy states that energy cannot be created or destroyed during a chemical reaction but can only be transformed or converted from one form to another.

Answer 4

The 1st Law of Thermodynamics tells us that energy is neither created nor destroyed, thus the energy of the universe is a constant. However, energy can certainly be transferred from one part of the universe to another. To work out thermodynamic problems we will need to isolate a certain portion of the universe, the system, from the remainder of the universe, the surroundings. This is also known as thelaw of conservation of energy.

The first law of thermodynamics is the application of the conservation of energy principle to heat and thermodynamic processes. The first law makes use of the key concepts of internal energy, heat, and system work. It is used extensively in the discussion of heat engines. The standard unit for all these quantities would be the joule, although they are sometimes expressed in calories or BTU (British thermal unit).

The total energy in the universe is present either as kinetic energy or as potential energy.

A simple example can be of water stored in a dam. This water has a potential energy due to its height. now when this water falls down, this potential energy is converted into kinetic energy. This kinetic energy then rotates the turbines and electricity is produced. So the potential energy gets converted to kinetic energy which in turn helps us to produce electricity and thereby the total energy remains constant.

Answer 5

Energy cannot be created or destroyed.

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Here's a quick breakdown of all three:

1st Law: you can't win (you can't get more than you started with).

2nd Law: you can only break even at absolute zero (some energy is always "lost" to heat except at absolute zero).

3rd Law: you can't ever reach absolute zero.

Answer 6

The first law of thermodynamics is simply the general law of conservation. We know that internal energy of U of a system can change through two modes either heat or work. This equation is the first law of thermodynamics dQ = dU + dW .

Answer 7

The "First Law of Thermodynamics" is the same as the "Law of Conservation of Energy". It means that there is a thing called energy, which can't be created or destroyed. The total amount of energy in the Universe doesn't change.

Answer 8

That's the same as the Law of Conservation of Energy.

Answer 9

energy can be transformed in different ways but can never be created or destroyed

Answer 10

The same as the Law of Conservation of Energy.