Question
Which statement is true of a reaction in which $\Delta V$ is positive? Explain.$$\text { a. }\Delta H=\Delta E \quad \text { b. } \Delta H>\Delta E \quad \text { c. } \Delta H<\Delta E$$
Step 1
$\Delta V$ is the change in volume. If $\Delta V$ is positive, it means the volume is increasing. Show more…
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For a reaction, $\mathrm{A}(\mathrm{g}) \rightarrow \mathrm{A}(\mathrm{l}) ; \Delta \mathrm{H}=-3 \mathrm{RT}$. The correct statement for the reaction is: (a) $\Delta \mathrm{H}=\Delta \mathrm{U} \neq \mathrm{O}$ (b) $\Delta \mathrm{H}=\Delta \mathrm{U}=\mathrm{O}$ (c) $|\Delta \mathrm{H}|<|\Delta \mathrm{U}|$ (d) $|\Delta \mathrm{H}|>|\Delta \mathrm{U}|$
Thermodynamics
Topic 2 : Thermochemistry
If $\Delta G$ for a reaction is negative, then which of the following is true? a. The reaction is spontaneous in the forward direction as written. b. The reaction system is at equilibrium. c. The reverse of the given reaction is spontancous. d. No reaction would ever have a negative $\Delta G$.
For a reaction with a negative $\Delta G^{\circ}$ value, which of the following statements is false? (a) The equilibrium constant $K$ is greater than one, (b) the reaction is spontaneous when all the reactants and products are in their standard states, and (c) the reaction is always exothermic.
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