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allsm [11]
3 years ago
14

Which of the following equations is balanced?

Chemistry
1 answer:
Georgia [21]3 years ago
4 0

Answer:

B

Explanation:

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Water (10 kg/s) at 1 bar pressure and 50 C is pumped isothermally to 10 bar. What is the pump work? (Use the steam tables.) -7.3
Andreyy89

Answer:

The pump work is 3451 kJ/s

Explanation:

Pump work (W) is calculated as

W = (h_f - h_i) \times \dot{m}

where

h_f is the enthalpy of water at its final state

h_i is the enthalpy of water at its initial state

\dot{m} = 10 kg/s is water mass flow

For liquids, properties are evaluated as saturated liquid. From the figure attached, it can be seen that

h_f = 762.81 kJ/kg

h_i = 417.46 kJ/kg

Replacing

W = (762.81 kJ/kg - 417.46 kJ/kg) \times 10 kg/s

W = 3451 kJ/s

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