As we did in the laboratory, we started heating water with constant pressure until it reached boiling point. Then, closing the valve which created a constant volume system. Forcing the pressure to increase as the temperature rises. And thus studying the direct relation between pressure and temperature for water at that point. We notice that it is essential to close the valve as we reach oiling point to make sure we are now in a constant volume process, otherwise pressure would have never increased.
Causing the experiment to be useless. We also notice that we closed the valve exactly when we reached boiling temperature (95 c at 0. 9 bar pressure) and thus keeping water at saturated liquid phase. After studying the results and plotting the diagram we find that the relation in between pressure and temperature is directly proportional. The difference between the theoretical values and the actual values is caused by errors with certain calculated acceptable percentages.