Pressure to Enthalpy Calculator:
Enter the values of change in pressure, dP(N/m2) and change in volume, dV(m3) to determine the value of Enthalpy from pressure, Ep(J).
Pressure to Enthalpy Formula:
Pressure to enthalpy describes the relationship between pressure changes in a system and the corresponding enthalpy changes. It is particularly relevant in thermodynamics where the work done by or on the system due to pressure changes is considered.
This concept is crucial in understanding energy exchanges in processes like phase transitions, chemical reactions, and thermodynamic cycles.
As pressure increases, the particles in a substance are squeezed closer together, potentially increasing the internal energy.
When the volume of a substance decreases due to pressure, its internal energy can also increase due to the closer proximity of particles.
Imagine a gas inside a container. When the pressure on the gas increases, it can cause the volume to decrease due to compression.
This compression can lead to an increase in the internal energy of the gas particles due to their closer proximity. The formula tells us that the change in enthalpy is related to the product of the change in pressure and the change in volume.
Enthalpy from pressure, Ep(J) in joules is calculated by the product of change in pressure, dP(N/m2) in Newton per metre square and change in volume, dV(m3) in cubic metres.
Enthalpy from pressure, Ep(J) = dP(N/m2) * dV(m3)
Ep(J) = enthalpy from pressure in joules, J.
dP(N/m2) = change in pressure in Newton per metre square, N/m2.
dV(m3) = change in volume in cubic metres, m3.
Pressure to Enthalpy Calculation:
- Finding Enthalpy Change:
Given: dP(N/m2) = 5000N/m2, dV(m3) = 0.2m3.
Enthalpy from pressure, Ep(J) = dP(N/m2) * dV(m3)
Ep(J) = 5000 * 0.2
Ep(J) = 1000J.
- Finding Pressure Change:
Given: Ep(J) = 3000J, dV(m3) = 0.5m3.
Enthalpy from pressure, Ep(J) = dP(N/m2) * dV(m3)
dP(N/m2) = Ep(J) / dV(m3)
dP(N/m2) = 3000 / 0.5
dP(N/m2) = 6000N/m2.