Which of the following is NOT a piece of equipment used to determine the change in enthalpy?Group of answer choicesErlenmeyer Flasktemperature probecalorimeterring stand

The piece of equipment that is NOT used to determine the change in enthalpy is the ring stand.

Here's why:

1. Erlenmeyer Flask: This is used in the laboratory to hold and mix chemicals. The narrow neck prevents splash exposure and the flat bottom allows the flask to stand on its own. When determining the change in enthalpy, the reaction is often carried out in an Erlenmeyer Flask.

2. Temperature Probe: This is used to measure the temperature of the reaction mixture. The change in temperature is used to calculate the change in enthalpy.

3. Calorimeter: This is the main equipment used to determine the change in enthalpy. It measures the heat of the reaction.

4. Ring Stand: This is used to hold or clamp laboratory glassware and other equipment in place, so that it does not move or fall during experiments. However, it does not play a direct role in determining the change in enthalpy.