Enthalpy Lab Pro | CivilPrep

1. Select Salt

Copper(II) Sulfate Exothermic (Heat Release)

Potassium Nitrate Endothermic (Heat Absorption)

2. Actions

Stirring ensures complete dissolution.

> System Initialized.

Enthalpy of Solution ($\Delta H_{soln}$)

The energy change when 1 mole of substance dissolves in a solvent. It is the sum of Lattice Energy (breaking crystal) and Hydration Energy (forming bonds with water).

Exothermic $\Delta H < 0$

Temp Rises

Endothermic $\Delta H > 0$

Temp Falls

Calculation

$$ q = m \cdot c \cdot \Delta T $$

$m$: Mass of solution (~100g)
$c$: Specific heat ($4.18 J/g^\circ C$)
$\Delta T$: $T_{final} - T_{initial}$

Steps

Preparation

Add 100g of distilled water to the calorimeter cup. Note initial temperature ($T_1$).

Addition

Add 5g of the selected salt. Ensure no spillage.

Dissolution

Stir continuously to ensure complete dissolution. Watch the graph for the peak temperature.

25.00 °C

Thermal Profile

Data Table

Time (s)	Temp (°C)	$\Delta T$