7/12/2023 0 Comments Thermodynamics calculator h2o![]() ![]() With the volume data and the density data, you can easily calculate the mass of liquid and vapor as a function of temperature. I don't know if an analytic solution exists for this process, but a numeric simulation, and a resulting curve fit, yielded the following for liquid and vapor volumes: Regarding the volume of liquid and vapor, as the liquid expands in a closed container, it takes up more volume than it originally did, so the "liquid" space expands while the "vapor" space contracts. Both liquid and vapor density can be obtained from steam tables, or from a quadratic or cubic curve fit on steam table data. Also, as the temperature goes up, the vapor density goes up, due to the higher vapor pressure of water at the higher temperature. So, in a nutshell, our case in point is completely determined by: $$U=U_0 \dot Q\Delta t$$ $$V=\mathrm$ then to convert moles water vapor to mass water vapor all you need to do is multiply by the molar mass.Īs the liquid and vapor temperature increases, the liquid density goes down, and the liquid expands. We need only to use the fact that the state of a pure, simple substance is uniquely determined by two independent parameters in order to predict the behavior of your system. note 1 Also, the total volume of your system is constant ( isochoric process). Are you studying basic thermodynamics? Because your question is exactly what people learn in the first few classes of this subject.įirst Law of Thermodynamics tells us that every joule of energy from the burner will act to increase the system's internal energy.
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