Answer is: the combined ionic bond strength of CrCl₂ and intermolecular forces between water molecules.
When chromium chloride (CrCl₂) is dissolved in water, the temperature of the water increases, heat of the solution is endothermic.
Dissociation of chromium chloride in water: CrCl₂(aq) → Cr²⁺(aq) + 2Cl⁻(aq).
Energy (the lattice energy) is required to pull apart the oppositely charged ions in chromium chloride.
The heat of hydration is liberated energy when the separated ions (in this example chromium cations and chlorine anions) attract polar water molecules.
Because the lattice energy is higher than the heat of the hydration (endothermic reaction), we can conclude that bonds between ions are strong (the electrostatic attraction between oppositely charged ions).
Answer:
At a constant 100km/hr, you would travel 600km
Explanation:
Have a good day :)
Answer:
Melting and boiling will be seen in this example. Condensation might be seen as well. In the Phases of Water Gizmo™, you can heat up or cool down a container of water.
Explanation:
Answer:
7.35 atm
Explanation:
From the question we are given;
- Initial volume, V1 as 28 L
- Initial temperature, T1 as 42°C or 315 K
- New volume. V2 as 49 L
- New temperature, T2 as 27°C or 300 K
- New Pressure, P2 as 4.0 atm
We are required to determine the initial pressure, P1
We are going to use the combined gas law...
According to the combined gas law,
Therefore, to get P1
We get;
Therefore, the initial pressure of the gas is 7.35 atm
