Firefox File Edit View History Bookmarks Tools Window Help Tue 12:17 AM a A ALEK

Question

Firefox File Edit View History Bookmarks Tools Window Help Tue 12:17 AM a A ALEKS: JianRong Lin | O THERMOCHEMISTRY Using the general properties of reaction enthalpy JianRong A chemist measures the enthalpy change H during the following reaction: COCI2(g) + 4 NH 3(g)-CO(NH2)2(s) + 2 NH4C1(s) 1--559.kl Use this information to complete the table below. Round each of your answers to the nearest kJ/mol reaction x 10 kJ Ar CO(NH2), (s) + 2NH4C1(s) COCI2(g) + 4NH3(g) kJ 3COCI2 (g) + 12NH3(g) 3CO(NH,), (s) + 6NH4C1(s) kJ Explanation Check

Explanation / Answer

1/4 CO(NH2)2 (s) + 1/2 NH4Cl(s) --> 1/4 COCl2(g) + NH3(g)

by reversing the above reaction and multipying with 4 gives the reaction for which delta H is provided

so by reversing the Delta H provided reaction and multiply it's Delta H with 1/4 give as the Delta H for this reaction

1/4(-delta H) = 1/4(-(-559Kj) = 139.75 Kj

similarly for 2nd reaction
CO(NH2)2 (s) + 2 NH4Cl(s) --> COCl2(g) + 4NH3(g)
by just reversing the Delta H provided reaction we will get this reaction

so Delta H = -(-559.Kj) = 559Kj

for 3rd reaction

3CO(NH2)2 (s) + 12 NH4Cl(s) --> 3COCl2(g) + 12NH3(g)
by multiplying with 3 of the Delta H given reaction we can get the delta H of 3rd reaction

delta H = 3*(-559kj) = -1677Kj

Related Questions

Navigate

• Browse (All)
• Browse F
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.