Heat cross exchanger

• cowboyMorty
cowboyMorty
TL;DR Summary
How do I break down this question for inputs for viscosity etc
I have a problem with a cross flow heat exchanger. Hot air enters at 150 degrees at a flow rate of 4.0m^3 s^-1 and a flow speed of 12m s^-1

Water has a flow rate of 0.5kg s^-1 in the tube which has a 50mm diameter

Inlet of the water is 12 degrees and decided outlet is 85

I am confident in my ability to answer the question but having one problem, I have to use an online steam calculator and need help which what prompts to use

My calculator prompts are

Pressure / temperature

Pressure / specific enthalphy

Pressure / specific entropy

Pressure / specific volume

Temperature / specific entropy

Temperature/ quality

Is there something I'm missing, I feel that temperature and specific entropy is the correct one but where do I get my entropy figures?

Any help would be appreciated

Welcome to PF, Morty. Is this question for schoolwork?

Welcome!
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