Urine odor gets worse with time because urine contains the metabolic product urea [CO(NH2)21, a compound that is slowly converted to ammonia and carbon dioxide: co(NH,),(aq) + H,0(1) co, (aq) + 2NH, (aq) This reaction is much too slow for the enthalpy change to be measured directly using a temperature change. Instead, the enthalpy change for the reaction may be calculated from the following data: Compound Urea(aq) Co2(aq) H20(0 NH3(aq) AHF (kJ/mol) -319.2 -412.9 -285.9 -80.8 1st attempt See Periodic Table O See Hint Calculate AHrxn for the conversion of urea into ammonia.

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Urine odor gets worse with time because urine contains the metabolic product urea [CO(NH₂)₂], a compound that is slowly converted to ammonia and carbon dioxide:

\[ \text{CO(NH}_2\text{)}_2 \, (\text{aq}) + \text{H}_2\text{O} \, (\text{l}) \rightarrow \text{CO}_2 \, (\text{aq}) + 2\text{NH}_3 \, (\text{aq}) \]

This reaction is much too slow for the enthalpy change to be measured directly using a temperature change. Instead, the enthalpy change for the reaction may be calculated from the following data:

| Compound       | ΔHf° (kJ/mol) |
|----------------|---------------|
| Urea(aq)       | -319.2        |
| CO₂(aq)        | -412.9        |
| H₂O(l)         | -285.9        |
| NH₃(aq)        | -80.8         |

**1st attempt**

Calculate ΔHf°rxn for the conversion of urea into ammonia.

\[ \boxed{ \, \, \, \, \, } \, \text{kJ} \]

**Options:**
- [See Periodic Table]
- [See Hint]
Transcribed Image Text:Urine odor gets worse with time because urine contains the metabolic product urea [CO(NH₂)₂], a compound that is slowly converted to ammonia and carbon dioxide: \[ \text{CO(NH}_2\text{)}_2 \, (\text{aq}) + \text{H}_2\text{O} \, (\text{l}) \rightarrow \text{CO}_2 \, (\text{aq}) + 2\text{NH}_3 \, (\text{aq}) \] This reaction is much too slow for the enthalpy change to be measured directly using a temperature change. Instead, the enthalpy change for the reaction may be calculated from the following data: | Compound | ΔHf° (kJ/mol) | |----------------|---------------| | Urea(aq) | -319.2 | | CO₂(aq) | -412.9 | | H₂O(l) | -285.9 | | NH₃(aq) | -80.8 | **1st attempt** Calculate ΔHf°rxn for the conversion of urea into ammonia. \[ \boxed{ \, \, \, \, \, } \, \text{kJ} \] **Options:** - [See Periodic Table] - [See Hint]
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