The internal energy of a system increases when energy is added to the system through heat transfer or work done on the system. This can result in an increase in temperature, change in phase, or other forms of internal energy change.
When mechanical work is done, the internal energy of a system can change. If work is done on the system, the internal energy increases. Conversely, if work is done by the system, the internal energy decreases. This change in internal energy is governed by the first law of thermodynamics.
The change in internal energy of a system that does 100 joules of work depends on the heat exchange as well. In general, the change in internal energy is equal to the amount of heat added to the system minus the work done by the system.
-70 Joules
In an adiabatic process, the work done is equal to the change in internal energy of a system.
The change in internal energy is the sum of heat added to the system and work done by the system on the surroundings. So, the change in internal energy is 2.500J (heat absorbed) - 7.655J (work done), resulting in a change of -5.155J.
The internal thermal energy of a system is directly related to its overall temperature change. When the internal thermal energy of a system increases, the temperature of the system also increases. Conversely, when the internal thermal energy decreases, the temperature of the system decreases. This relationship is governed by the principle of conservation of energy, where energy cannot be created or destroyed, only transferred or converted.
The change in internal energy is equal to the energy added minus the work done by the system. In this case, the change in internal energy is 35 J - 15 J = 20 J.
In a thermodynamic system, work, heat transfer, and change in internal energy are related through the first law of thermodynamics. This law states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system. This relationship helps to understand how energy is transferred and transformed within a system.
During reversible adiabatic expansion, the work done by the system is equal to the change in internal energy.
During an isothermal expansion, the work done is equal to the change in internal energy of the system.
the system has been given internal energy of 640j and the work system does on surroundings is 260j. therefore by first law of thermodynamics the internal energy of system increases by (640-260=380)j.