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7. If the coefficients of thermal expansion () and compressibility () of molten polystyrene (PS) are about 2.1104K1 and 4.3106atm1, respectively, and those of glassy

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7. If the coefficients of thermal expansion () and compressibility () of molten polystyrene (PS) are about 2.1104K1 and 4.3106atm1, respectively, and those of glassy PS are 6.3 104K1 and 1.7105atm1, respectively, at what pressure will the glass transition temperature (Tg ) of PS be increased from 100C at 1atm to 120C ? State all assumptions

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