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## Q. 2.12

For the flow calorimeter just discussed, the following data were taken with water as the test fluid:

$Flow rate = 4.15 g . s^{−1} t_{1} = 0°C t_{2} = 300°C P_{2} = 3 bar$

Rate of heat addition from resistance heater = 12,740 W

The water is completely vaporized in the process. Calculate the enthalpy of steam at 300°C and 3 bar based on H = 0 for liquid water at 0°C.

## Verified Solution

If Δz and $Δu^{2}$ are negligible and if $W_{s} and H_{1}$ are zero, then $H_{2}= Q$, and

$H_{2} = \frac{12,740 J⋅s^{-1} }{4.15 g⋅s^{-1}} = 3070 J⋅ g^{-1} or 3070 kJ⋅ kg^{-1}$