Which of the following is the first law of thermodynamics?
The First Law of Thermodynamics states that heat is a form of energy, and thermodynamic processes are therefore subject to the principle of conservation of energy. This means that heat energy cannot be created or destroyed.19 мая 2015 г.
Which of the following is the best description of the second law of thermodynamics?
The Second Law of Thermodynamics says that processes that involve the transfer or conversion of heat energy are irreversible. The laws of thermodynamics describe the relationships between thermal energy, or heat, and other forms of energy, and how energy affects matter.22 мая 2015 г.
Which best expresses the first law of thermodynamics?
The first law of thermodynamics states that the change in internal energy of a system equals the net heat transfer into the system minus the net work done by the system. In equation form, the first law of thermodynamics is ΔU = Q − W.
What is the 1st law of thermodynamics quizlet?
1st law of thermodynamics. the total amount of energy in the universe is constant, energy cannot be created or destroyed, only transferred or transformed.
What are the applications of first law of thermodynamics?
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.
What is the importance of first law of thermodynamics?
The First Law of Thermodynamics is an expression of the principle of conservation of energy. It states that energy is always conserved, it cannot be created or destroyed. It can be converted from one form to another. According to this law the total amount of energy and matter remains constant in the Universe.
Does this diagram illustrate the Second Law of Thermodynamics?
Answer: The diagram is not showing the second law of thermodynamics. It is the demonstration of 1st law of thermodynamics.
What is the definition of thermodynamics?
Thermodynamics is a branch of physics which deals with the energy and work of a system. It was born in the 19th century as scientists were first discovering how to build and operate steam engines. Thermodynamics deals only with the large scale response of a system which we can observe and measure in experiments.
Which of the following is the best definition of entropy?
Entropy, the measure of a system’s thermal energy per unit temperature that is unavailable for doing useful work. Because work is obtained from ordered molecular motion, the amount of entropy is also a measure of the molecular disorder, or randomness, of a system.
What is first law of thermodynamics in physics?
The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic processes, distinguishing two kinds of transfer of energy, as heat and as thermodynamic work, and relating them to a function of a body’s state, called Internal energy.
How was the first law of thermodynamics discovered?
This law was first expressed by Rudolf Clausius in 1850 when he said: “There is a state function E, called ‘energy’, whose differential equals the work exchanged with the surroundings during an adiabatic process.” However, it was Germain Hess (via Hess’s Law), and later by Julius Robert von Mayer who first formulated …
Which of the following is a law of thermodynamics?
Traditionally, thermodynamics has stated three fundamental laws: the first law, the second law, and the third law. A more fundamental statement was later labelled the ‘zeroth law’. The zeroth law of thermodynamics defines thermal equilibrium and forms a basis for the definition of temperature.