A 0.5-m-long thin vertical plate is subjected to a uniform heat flux of 1200 W/m2 on one side, while the other side is exposed to hydrogen gas at 5°C. Assuming that the properties of the hydrogen gas can be evaluated at 50°C, determine the plate midpoint temperature TL / 2. Is 50°C an appropriate film temperature for evaluation of the properties of the hydrogen gas?

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