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4.90 Propane vapor enters a valve at 1.0 MPa, 608C, and leaves at 0.3 MPa. If...

4.90 Propane vapor enters a valve at 1.0 MPa, 608C, and leaves at 0.3 MPa. If the propane undergoes a throttling process, what is the temperature of the propane leaving the valve, in 8C?

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