Which of the following is correct potential energy diagram for the given chain propagation step ?
`CH_(30-H+F^(.) rarr overset(.)(C)H_(3)+H-F Delta H^(@)=-134 Kj//mol`

Which of the following is//are the chain termination step during photochloration of ethane? CH_(3)overset(.) (C)H_(2)+ overset(.)(C)l toCH_(3)-CH_(2)-Cl CH_(3)overset(.)(C)H_(2)+CH_(3)overset(.)(C)H_(2) to CH_(3)CH_(2)CH_(2)CH_(3) overset(.) (C)l+overset(.)(C)l to Cl_(2) overset(.)(C)l+overset(.)H to HCl

From the following data, mark the option (s) where Delta H is correctlt written for the given reaction. Given H^(+)(aq) + OH^(-)(aq) rarr H_(2)O(l), Delta H = -57.3 kJ Delta H_("solution") of HA(g) = -70.7kJ/mol Delta H_("solution") of BOH(g) = 20kJ/mol Delta H_("ionization") of HA = 15 kJ/mol and BOH is a strong base Reaction Delta H_(r)(kJ//mol)

Rank the transition states that occur during the following reaction steps in order of increasing stability (least rarr most stable) : 1. H_(3)C - overset(+)(O)H_(2) rarr CH_(3)^(+) + H_(2)O 2. (CH_(3))_(3)C - overset(+)(C)H_(2) rarr (CH_(3))_(3)C^(+) + H_(2)O 3. (CH_(3))_(2)CH - overset(+)(O)H_(2) rarr (CH_(3))_(2)CH^(+) + H_(2)O

With the help of a thermochemical equation, calculate Delta_(f)H^(@) at 298 K for the following reactions : "C(graphite)" + O_(2)(g) rarr CO_(2)(g) , Delta H = -393.5 kJ//mol H_(2)(g) + (1)/(2)O_(2)(g) rarr H_(2)O(l) , Delta_(f)H^(@) = -285.8 kJ//mol CO_(2)(g) + 2H_(2)O(l) rarr CH_(4)(g) + 2O_(2)(g) , Delta_(f)H^(@) = +890.3 kJ//mol