Use the Standard Reaction Enthalpies Given Below to Determine

question 77

Multiple Choice

Use the standard reaction enthalpies given below to determine H° for the following reaction: 2NO(g) + O₂(g) → 2NO₂(g) H° = ?
Given:
N₂(g) + O₂(g) → 2NO(g) H° = +183 kJ
1/2 N₂(g) + O₂(g) → NO₂(g) H° = +33 kJ

• A) -150. kJ mol^-1
• B) -117 kJ mol^-1
• C) -333 kJ mol^-1
• D) +115 kJ mol^-1
• E) +238 kJ mol^-1

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Definitions:

RR Parent

Refers to a plant that is homozygous for the round seed shape allele in Mendelian genetics, "RR" signifies both alleles for a trait are the same (dominant).

Dominant Phenotype

The observable trait or characteristics of an organism that masks the effect of a recessive allele; it is expressed in the phenotype when a dominant allele is present.

Genotype

The genetic constitution of an individual organism, determining specific traits by its DNA sequence.

Aa

An abbreviation often used in genetics to denote a homozygous recessive genotype.