1.

Steam having CP = 105 J/^oC, is heated from 100^oC to 104^oC, what is the enthalpy change?(a) 210 J(b) 420 J(c) 630 J(d) 840 J

Answer» Right choice is (b) 420 J

The best I can explain: ∆H = 100∫^104105.dT = 105*4 = 420 J.


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