The total bonding energy for the products of a reaction is 1230 kj/mol and the bonding energy of the reactants is 565 kj/mol. calculate the change in enthalpy, and classify the reaction as endothermig or exothermic. -665 kj/mol, endothermic 665 kj/mol, exothermic -665 kj/mol, exothermic 665 kj/mol, endothermic

A100 kmol/h stream that is 97 mole% carbon tetrachloride (ccl4) and 3% carbon disulfide (cs2) is to be recovered from the bottom of a distillation column. the feed to the column is 16 mole% cs2 and 84% ccl4, and 2% of the ccl4 entering the column is contained in the overhead stream leaving the top of the column. calculate the mass and mole fractions of ccl4 in the overhead stream, and determine the molar flow rates of ccl4 and cs2 in the overhead and feed streams. 12. mw_ccla- 153.82; mw_cs2-76.14.

Which one of the following bonds would you expect to be the most polar? a) b–h b) n–h c) p–h d) al–h e) c–h

What must be in balance for temperatures to remain constant?