Ammonium Nitrate Sometimes Is Used in Cold Packs Because Its

question 54

Multiple Choice

Ammonium nitrate sometimes is used in cold packs because its enthalpy of solvation in water is +21 kJ/mol. What is the minimum amount of ammonium nitrate (80.05 g/mol) that is needed to cool a 1.0 L soft drink (d = 1.0 g/mL, specific heat 4.5 J g^-1 °C^-1) and its plastic bottle (heat capacity 50 J/K) from 30°C to 5°C.

• A) 540 g
• B) 320 g
• C) 110 g
• D) 430 g
• E) 250 g

---

Definitions:

Remarried Family

A family structure formed when one or both partners in a marriage have been previously married and may involve stepchildren.

Stepparent

An individual who is married to a person with children from a previous relationship and may take on a parental role to their stepchildren.

Parental Entitlement

The belief some parents hold that they have special rights or privileges in society and over their children, beyond what is typical or legally recognized.

Noncustodial Father

A father who does not have legal custody of his child, meaning the child resides primarily with the other parent.