Question

微涼🌊

求解！！謝謝

( ) 2.下述為五種化合物的溶解反應方程式,假設五種化合物每克價錢均相同,若你是廠商,
何者作為暖暖包經濟利潤最大?(分子量:MgSO4 = 120,NH4Cl = 53.5,NaCl = 58.5,
CaCl₂ = 111 NH4NO3 = 80)
2+
MgSO4(s) → Mg²+ (aq) + SO42² (aq)
NH4Cl(s)→ NH4 (aq) + Cl (aq)
NaCl(s) → Na (aq) + Cl (aq)
2+
CaCl₂(s)→ Ca²+ (aq) + 2Cl(aq)
,
AH = - 85 kJ/mol
AH + 14.78 kJ/mol
=
AH + 3.9 kJ/mol
=
AH:
==
- 120 kJ/mol
D
NH4NO3(s)→→ NH4*(aq) + NO3(aq)
AH+27.1 kJ/mol
(A)MgSO4 (B)NH4Cl (C)NaCl (D)CaCl2 (E)NH4NO3 °