Question

Complete the analogy:- ice + common salt : ________ : : dry ice + alcohol : -80°C​

Answer 1

ice + common salt :Melting ice  : : dry ice + alcohol : -80°C​

Melting ice is an endothermic process whether there is salt involved or not, but when you add the salt you alter how readily water can refreeze back into ice. In pure water, ice melts, cools the surroundings and water, and some of the energy that is absorbed is released again as the water returns to ice.

Dry ice is solid carbon dioxide. It forms at a temperature of -78.5 °C (-109°F). At room temperature, dry ice transitions rapidly from its solid to its gaseous state. Adding isopropyl alcohol to dry ice makes the liquid cool very quickly.

Answer 2

ice + common salt : Melting ice : -21^0C :: dry ice + alcohol: - 80^0 C

Explanation:

• Melting ice is endothermic process whether there is salt involved or not, but when you add the salt you add the salt you alter how readily water can refreeze back into ice.
• In pure water, ice melts, cools the surrounding and water, and some of the energy that is absorbed is released again as the water returns to ice.
• Dry ice is solid carbon dioxide. At room temperature, dry ice transition rapidly from its solid to its gaseous state.
• Adding isopropyl alcohol to dry ice makes the liquid cool very quickly.