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Hess's law states that The heat roleavod or absorbod in a chemical procers is the same whether the process takes place in orte of in sevoral steps " it es important fo recall the follcwing rules Calculate the enthalpy of the feaction 1. When fwo reactions are addod, therr Part A onthalpy valuos are added 2NO(s)+O2​( g)→2NO2​( g) 2. When a reaction is reversed, the sign of given the following reactions and enthalpies of formation its enthały value changos 3. When the coefficients of a reaction are A+N2​( g)+O2​( g)→NO2​( g),ΔHA​=33.2 kJ multipled by a factot, the enthalpy valive B:21​ N2​( g)+21​O2​( g)→NO(g),ΔHB0​=90.2k.l is multiplied by that same factor. Express your answer with the appropriate units.
3. When the coeflicionts of a raachon are multylied by a factor, the enthalpy value is mainglied by that same factor. given the foliowing pertinent information  A. B2​O3​( s)+3H2​O(g)→3O2​( g)+B2​H6​( g), B. 2 B( s)+3H2​( g)→B2​H6​( g), C. H2​( g)+21​O2​( g)→H2​O(l), D. H2​O(l)→H2​O(g),​ΔHA∘​=+2035 kJΔHB∘​=+36 kJΔHC∘​=−285 kJΔHD∘​=+44 kJ​ Express your answer with the appropriate units. - View Available Hint(s)