The Gibbs minimization reactor can be modeled either as an isothermal process, or as process with external heating or cooling. In the first case, reactor temperature is specified. In case of specified heat duty, the reactor temperature is calculated from the energy balance; the energy balance is based on the enthalpy that includes formation heats and does not require specification of heats of reaction.
The heat duty can be specified directly or via an energy inlet stream. If heat duty is not specified via an energy inlet stream, an energy outlet stream can be connected that will receive the heat duty for the reactor.