Questions: Which one of the following is an exothermic process? - boiling soup - water evaporating - condensation of water vapor - ice melting - Ammonium thiocyanate and barium hydroxide are mixed at 25°C: the temperature drops

Which one of the following is an exothermic process?
- boiling soup
- water evaporating
- condensation of water vapor
- ice melting
- Ammonium thiocyanate and barium hydroxide are mixed at 25°C: the temperature drops

Transcript text: Which one of the following is an exothermic process? boiling soup water evaporating condensation of water vapor ice melting Ammonium thiocyanate and barium hydroxide are mixed at $25^{\circ} \mathrm{C}$ : the temperature drops

Solution

Solution Steps

Step 1: Understanding Exothermic Processes

An exothermic process is one in which energy is released in the form of heat. This typically occurs when bonds are formed in a chemical reaction or when a substance changes state in a way that releases energy.

Step 2: Analyzing Each Option

Boiling soup: This is an endothermic process because it requires heat to convert the liquid into vapor.
Water evaporating: This is also an endothermic process as it requires heat to change water from liquid to gas.
Condensation of water vapor: This is an exothermic process because it releases heat when water vapor changes to liquid.
Ice melting: This is an endothermic process because it requires heat to change ice from solid to liquid.
Ammonium thiocyanate and barium hydroxide are mixed at $25^{\circ} \mathrm{C}$: the temperature drops: This indicates an endothermic process because the system absorbs heat, causing the temperature to drop.