Question

need help clear your answer !!

Question 1 (1 point) Which of the following correctly lists the ions in order of increasing absolute value of the enthalpy of hydration? O 1) srat < cazt <I 2) I < Sr2+ < Ca2+ 03) sr2< < cazt O 4) caz* < Srz* <I 05) Ca2+ < I < Sr2+

Answer 1

question 1

answer 2). I^{​​​​​​-} < Sr ²⁺ < Ca^{​​​​​​2+}

while increasing the atomic size of the ion, heat of hydration enthalpy will be decrease.

Ca^{​​​​​2+} is smallest in thr above

I^{​​​​​-} is larger.

Question 2

Answer 3) both i and ii

InhIn enthalpy and combustion enthalpy heat energy will release, that mean it is exothermic reaction. Delta H will negitive in both cases.enthalpy change us negetive in both cases