Question

Asked Jan 7, 2020

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0.62 lbm of saturated liquid water at 10 psia absorbs a constant 1.5 kW of energy from an electrical resistance heater in an isobaric adiabatic process, until the water reaches a temperature of 200 ∘F.

Assuming no heat losses from the container, how long did this take?

Step 1

The specific internal energy for saturated liquid water at 10 psia taken from the steam tables is:

Step 2

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