Question

For the flow calorimeter just discussed, the following data are taken with water as the test fluid:–Flow rate = 4.15 g/s, t1= 0 °C, t2= 300 °and P2= 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

Answer 1

Explanation:

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26 Celsius

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Answer 2

Explanation:

Density of liquid = 0.2gm/cm

3

θ=mcΔT (θ=heat flow)

θ=D×V×C×ΔT (D=density,V=volume,C=Thermal capacity)

Differentiating

dt

dθ

=0.2×10×C×25

250=50×C

C=5cal/gm°C

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