Analysis:
From the data in Table 1, the general characteristics of parallel flow and counter flowheat exchangers can be observed. In the parallel flow configuration, the exit temperature of thehot fluid must be higher than the exit temperature of the cold fluid. This is supported by the datataken. In the counter flow configuration, the exit temperature of the hot fluid must be higherthan the entrance temperature of the cold fluid, but it does not necessarily need to be higher thanthe exit temperature of the cold fluid. This is also supported by the data, even though in this case