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## Isochoric process
An If an ideal gas is used in an isochoric process, and the quantity of gas stays constant, then the increase in energy is proportional to an increase in temperature and pressure. Take for example a gas heated in a rigid container: the pressure and temperature of the gas will increase, but the volume will remain the same. A real life example of an isochoric process is burning of a petrol-air mixture in an internal combustion engine, of any petrol/gasoline car. ## EquationsIf the volume stays constant (Δ - Δ
*W*=*P*Δ*V*,
where By applying the first law of thermodynamics, we can deduce that Δ - Δ
*U*=*Q*
for an isochoric process: all the heat being transferred to the system is added to the system's internal energy, *Q*=*n**C*_{V}Δ*T*
where On a pressure volume diagram, an isochoric process appears as a straight vertical line. Its thermodynamic conjugate, an isobaric process would appear as a straight horizontal line. ## See also |

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Isochoric_process". A list of authors is available in Wikipedia. |