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# hw2 - ME 235 HW set 2 3.16 Carbon dioxide at 280 K can be...

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ME 235 HW set 2 3.16 Carbon dioxide at 280 K can be in different phases. Indicate the pressure range you have for each of the three phases (vapor, liquid and solid). Look at the P-T phase diagram in Fig. 3.6 at 280 K: P < 4000 kPa vapor 4000 kPa < P < 400 MPa liquid 400 MPa < P solid ln P T V L S 280 K 3.26 Determine the phase of the substance at the given state using Appendix B tables a) Water 100 ° C, 500 kPa b) Ammonia -10 ° C, 150 kPa c) R-410a 0 ° C, 350 kPa Solution: a) From Table B.1.1 P sat (100 ° C) = 101.3 kPa 500 kPa > P sat then it is compressed liquid OR from Table B.1.2 T sat (500 kPa) = 152 ° C 100 ° C < T sat then it is subcooled liquid = compressed liquid b) Ammonia NH 3 : Table B.2.1: P < P sat (-10 ° C) = 291 kPa Superheated vapor c) R-410a Table B.4.1: P < P sat (0 ° C) = 799 kPa Superheated vapor. The S-L fusion line goes slightly to the left for water. It tilts slightly to the right for most other substances. ln P T Vapor L Cr.P. a b,c S

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3.27 Determine whether water at each of the following states is a compressed liquid, a superheated vapor, or a mixture of saturated liquid and vapor.
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hw2 - ME 235 HW set 2 3.16 Carbon dioxide at 280 K can be...

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