A student mixes two aqueous solutions in a polystyrene cup

CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics

Problem

A student mixes two aqueous solutions in a polystyrene cup. The thermometer reading rises from 21.4 °C to 27.8 °C. Identify whether the chemical process occurring in the cup is endothermic or exothermic.

Related theory

Thermodynamics
Types of enthalpy
Endothermic and exothermic reactions
Enthalpy Changes of Reactions

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