It is an emotional disorder involving distortion of body image and an obsessive desire to lose weight, in which bouts of extreme overeating are followed by depression and self-induced vomiting, purging, or fasting.<span>The exact cause of bulimia is currently unknown; though it is thought that multiple factors contribute to the development of this eating disorder, including genetic, environmental, psychological, and cultural influences. Some of the main causes for bulimia include:
</span><span>Stressful transitions or life changes
History of abuse or trauma
Negative body image
Poor self-esteem
<span>Professions or activities that focus on appearance/performance</span></span>
2. B. Weathering breaks rocks into minerals, and plants die and decay.
3. D. sand
4. B. silt
5. B. sand
Hope this helps!
Answer : The value of
for the reaction is -959.1 kJ
Explanation :
The given balanced chemical reaction is,
![2H_2S(g)+3O_2(g)\rightarrow 2H_2O(g)+2SO_2(g)](https://tex.z-dn.net/?f=2H_2S%28g%29%2B3O_2%28g%29%5Crightarrow%202H_2O%28g%29%2B2SO_2%28g%29)
First we have to calculate the enthalpy of reaction
.
![\Delta H^o=H_f_{product}-H_f_{reactant}](https://tex.z-dn.net/?f=%5CDelta%20H%5Eo%3DH_f_%7Bproduct%7D-H_f_%7Breactant%7D)
![\Delta H^o=[n_{H_2O}\times \Delta H_f^0_{(H_2O)}+n_{SO_2}\times \Delta H_f^0_{(SO_2)}]-[n_{H_2S}\times \Delta H_f^0_{(H_2S)}+n_{O_2}\times \Delta H_f^0_{(O_2)}]](https://tex.z-dn.net/?f=%5CDelta%20H%5Eo%3D%5Bn_%7BH_2O%7D%5Ctimes%20%5CDelta%20H_f%5E0_%7B%28H_2O%29%7D%2Bn_%7BSO_2%7D%5Ctimes%20%5CDelta%20H_f%5E0_%7B%28SO_2%29%7D%5D-%5Bn_%7BH_2S%7D%5Ctimes%20%5CDelta%20H_f%5E0_%7B%28H_2S%29%7D%2Bn_%7BO_2%7D%5Ctimes%20%5CDelta%20H_f%5E0_%7B%28O_2%29%7D%5D)
where,
= enthalpy of reaction = ?
n = number of moles
= standard enthalpy of formation
Now put all the given values in this expression, we get:
![\Delta H^o=[2mole\times (-242kJ/mol)+2mole\times (-296.8kJ/mol)}]-[2mole\times (-21kJ/mol)+3mole\times (0kJ/mol)]](https://tex.z-dn.net/?f=%5CDelta%20H%5Eo%3D%5B2mole%5Ctimes%20%28-242kJ%2Fmol%29%2B2mole%5Ctimes%20%28-296.8kJ%2Fmol%29%7D%5D-%5B2mole%5Ctimes%20%28-21kJ%2Fmol%29%2B3mole%5Ctimes%20%280kJ%2Fmol%29%5D)
![\Delta H^o=-1035.6kJ=-1035600J](https://tex.z-dn.net/?f=%5CDelta%20H%5Eo%3D-1035.6kJ%3D-1035600J)
conversion used : (1 kJ = 1000 J)
Now we have to calculate the entropy of reaction
.
![\Delta S^o=S_f_{product}-S_f_{reactant}](https://tex.z-dn.net/?f=%5CDelta%20S%5Eo%3DS_f_%7Bproduct%7D-S_f_%7Breactant%7D)
![\Delta S^o=[n_{H_2O}\times \Delta S_f^0_{(H_2O)}+n_{SO_2}\times \Delta S_f^0_{(SO_2)}]-[n_{H_2S}\times \Delta S_f^0_{(H_2S)}+n_{O_2}\times \Delta S_f^0_{(O_2)}]](https://tex.z-dn.net/?f=%5CDelta%20S%5Eo%3D%5Bn_%7BH_2O%7D%5Ctimes%20%5CDelta%20S_f%5E0_%7B%28H_2O%29%7D%2Bn_%7BSO_2%7D%5Ctimes%20%5CDelta%20S_f%5E0_%7B%28SO_2%29%7D%5D-%5Bn_%7BH_2S%7D%5Ctimes%20%5CDelta%20S_f%5E0_%7B%28H_2S%29%7D%2Bn_%7BO_2%7D%5Ctimes%20%5CDelta%20S_f%5E0_%7B%28O_2%29%7D%5D)
where,
= entropy of reaction = ?
n = number of moles
= standard entropy of formation
Now put all the given values in this expression, we get:
![\Delta S^o=[2mole\times (189J/K.mol)+2mole\times (248J/K.mol)}]-[2mole\times (206J/K.mol)+3mole\times (205J/K.mol)]](https://tex.z-dn.net/?f=%5CDelta%20S%5Eo%3D%5B2mole%5Ctimes%20%28189J%2FK.mol%29%2B2mole%5Ctimes%20%28248J%2FK.mol%29%7D%5D-%5B2mole%5Ctimes%20%28206J%2FK.mol%29%2B3mole%5Ctimes%20%28205J%2FK.mol%29%5D)
![\Delta S^o=-153J/K](https://tex.z-dn.net/?f=%5CDelta%20S%5Eo%3D-153J%2FK)
Now we have to calculate the Gibbs free energy of reaction
.
As we know that,
![\Delta G^o=\Delta H^o-T\Delta S^o](https://tex.z-dn.net/?f=%5CDelta%20G%5Eo%3D%5CDelta%20H%5Eo-T%5CDelta%20S%5Eo)
At room temperature, the temperature is 500 K.
![\Delta G^o=(-1035600J)-(500K\times -153J/K)](https://tex.z-dn.net/?f=%5CDelta%20G%5Eo%3D%28-1035600J%29-%28500K%5Ctimes%20-153J%2FK%29)
![\Delta G^o=-959100J=-959.1kJ](https://tex.z-dn.net/?f=%5CDelta%20G%5Eo%3D-959100J%3D-959.1kJ)
Therefore, the value of
for the reaction is -959.1 kJ
<span>The answer to your question is the 3rd option </span>
Answer:
22.46
Explanation:
.There are 3.79 liters in one gallon