Question
Which compound would make the best cold pack?
a
NaOH
b
LiCl
c
NaCl
d
KCl
a
NaOH
b
LiCl
c
NaCl
d
KCl
Answers
GPT-4o mini
To determine which compound would make the best cold pack, we should consider the enthalpy of dissolution of each compound. A good cold pack works by absorbing heat from the environment when the compound dissolves in water.
Among the options provided:
a. **NaOH** - Sodium hydroxide has a highly exothermic dissolution process, which means it releases heat rather than absorbs it, making it unsuitable for a cold pack.
b. **LiCl** - Lithium chloride has a strong endothermic dissolution process, absorbing a significant amount of heat from the surroundings, making it effective for a cold pack.
c. **NaCl** - Sodium chloride also dissolves endothermically, but the heat absorption is not as significant as that of LiCl.
d. **KCl** - Potassium chloride also absorbs heat when dissolved, but not as effectively as LiCl.
Based on this analysis, the best compound for a cold pack among the options is **b. LiCl** (Lithium chloride), as it absorbs the most heat during dissolution.
Among the options provided:
a. **NaOH** - Sodium hydroxide has a highly exothermic dissolution process, which means it releases heat rather than absorbs it, making it unsuitable for a cold pack.
b. **LiCl** - Lithium chloride has a strong endothermic dissolution process, absorbing a significant amount of heat from the surroundings, making it effective for a cold pack.
c. **NaCl** - Sodium chloride also dissolves endothermically, but the heat absorption is not as significant as that of LiCl.
d. **KCl** - Potassium chloride also absorbs heat when dissolved, but not as effectively as LiCl.
Based on this analysis, the best compound for a cold pack among the options is **b. LiCl** (Lithium chloride), as it absorbs the most heat during dissolution.