4

4-1. . 4.3.

4-3. S500 = 152.7 /( . ).

4-4. delta.uc.gif (844 bytes)S = 21.6 /.

4-5. delta.uc.gif (844 bytes)S = 8.1 /.

4-6. delta.uc.gif (844 bytes)S = 170 /.

4-7.T2 = 184 K, V2 = 45.4 , A = 1491 , delta.uc.gif (844 bytes)U = 1491 , delta.uc.gif (844 bytes)H = 2478 , delta.uc.gif (844 bytes) S = 0.

4-8. delta.uc.gif (844 bytes)S = 41.7 /.

4-9. delta.uc.gif (844 bytes) S = 246.8 /.

4-10. delta.uc.gif (844 bytes) S = 37.1 /.

4-11. .

4-12. ) D S = nR ln(p1/p2), D S = nR ln(p1/p2 ); ) D S = nR ln(p1/p2), D S = nRp (1/p1 1/p2).

4-13. .

4-15. S(T,p) = Cp lnT R lnp + const.

4-16. S(V) = R ln(Vb) a/(T 2V) + const.

4-17. S(V) = R (lnV b/V c/(2V 2)) + const.

4-18. D S = R ln[(V2b)/(V1b)].

4-19. D S = 531 /.

4-20. . : .

4-21. CH4() + 2O2() = CO2() + 2H2O() .

4-22. = 44.4 /( . ); = 50.9 /( . ).