Question

For the process, NH3 (g) + HCl (g)
-NH,Cl (s), which is right?
1 AH> 0; AS > 0
2 AH < 0; AS > 0
3 AH>0; AS < 0
4 AH<0; AS < 0
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Answer 1

The Internal Energy as a State ... you have already studied in section 6.1.2. ... (isolated system) i.e., if w = 0 and q = 0, then. ∆ U = 0. The equation 6.1 i.e., ∆U = q + w is ... Na(s) → Na(g) ; ∆aH0 = 108.4 kJ mol–1.