Question: 1. A wettability test is done for two different solids: Aluminum and PTFE. The surface free energies were calculated as: Between Al-liquid: 70.3 J/m2 Between

1. A wettability test is done for two different solids: Aluminum and PTFE. The surface free energies were calculated as:

Between Al-liquid: 70.3 J/m2

Between liquid-vapor: X J/m2

Between Al-vapor: 30.7 J/m2

Between PTFE-liquid: 50.8 J/m2

Between liquid-vapor: Y J/m2

Between PTFE-vapor: 22.9 J/m2

Assuming the liquid is distilled water,

Please calculate the maximum range of X and Y and restrict the range into a reasonable

length of 5 /2

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