Thermodynamics is a branch of Physics deals with transfer of heat energy into different forms of energies and its applications.
Heat was a form of energy and the experiment demonstrated conversion of energy from one form to another–from work to heat.
Thermodynamics is the branch of physics that deals with the concepts of heat and temperature and the inter conversion of heat and other forms of energy. Thermodynamics is a macroscopic science. It deals with bulk systems and does not go into the molecular constitution of matter. Thermodynamic description involves relatively few macroscopic variables of the system, which are suggested by common sense and can be usually measured directly.
Thermodynamic description of a gas, on the other hand, avoids the molecular description altogether. The state of a gas in thermodynamics is specified by macroscopic variables such as pressure, volume, temperature, mass and composition that are felt by our sense perceptions and are measurable.
In mechanics, our interest is in the motion of particles or bodies under the action of forces and torques. Thermodynamics is not concerned with the motion of the system as a whole. It is concerned with the internal macroscopic state of the body.
When a bullet is fired from a gun, what changes is the mechanical state of the bullet (its kinetic energy, in particular), not its temperature. When the bullet pierces a wood and stops, the kinetic
energy of the bullet gets converted into heat, changing the temperature of the bullet and the surrounding layers of wood. Temperature is related to the energy of the internal (disordered) motion of the bullet, not to the motion of the bullet as a whole.
The state of a system is an equilibrium state if the macroscopic variables that characterize the system do not change in time. For example, a gas inside a closed rigid container, completely insulated from its surroundings, with fixed values of pressure, volume, temperature, mass and composition that do not change with time, is in a state of thermodynamic equilibrium.
Other useful topics in physics
Heat transfer by radiation
Heat transfer by convection
Heat transfer and conduction
Heat and Temperature
Change of State
Heat was a form of energy and the experiment demonstrated conversion of energy from one form to another–from work to heat.
Thermodynamics is the branch of physics that deals with the concepts of heat and temperature and the inter conversion of heat and other forms of energy. Thermodynamics is a macroscopic science. It deals with bulk systems and does not go into the molecular constitution of matter. Thermodynamic description involves relatively few macroscopic variables of the system, which are suggested by common sense and can be usually measured directly.
Thermodynamic description of a gas, on the other hand, avoids the molecular description altogether. The state of a gas in thermodynamics is specified by macroscopic variables such as pressure, volume, temperature, mass and composition that are felt by our sense perceptions and are measurable.
In mechanics, our interest is in the motion of particles or bodies under the action of forces and torques. Thermodynamics is not concerned with the motion of the system as a whole. It is concerned with the internal macroscopic state of the body.
When a bullet is fired from a gun, what changes is the mechanical state of the bullet (its kinetic energy, in particular), not its temperature. When the bullet pierces a wood and stops, the kinetic
energy of the bullet gets converted into heat, changing the temperature of the bullet and the surrounding layers of wood. Temperature is related to the energy of the internal (disordered) motion of the bullet, not to the motion of the bullet as a whole.
The state of a system is an equilibrium state if the macroscopic variables that characterize the system do not change in time. For example, a gas inside a closed rigid container, completely insulated from its surroundings, with fixed values of pressure, volume, temperature, mass and composition that do not change with time, is in a state of thermodynamic equilibrium.
Other useful topics in physics
Cyclic Process,Reversible Process and Work Done Graphs
Degree of freedom and Law of the Equipartisien energy
Heat transfer by convection
Heat transfer and conduction
Heat and Temperature
Change of State
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