Hydration, oxidation, carbonisation, hydrolysis and dissolution are forms of chemical weathering.
Answer:
(e) -6.1 J/K
Explanation:
Step 1: Given data
- Heat of fusion of ice (ΔH°fus): 333.5 J/g
Step 2: Calculate the heat (Qfreezing) required to freeze 5.0 g of water
We will use the following expression.
Qfreezing = -ΔH°fus × m
Qfreezing = -333.5 J/g × 5.0 g = -1.7 × 10³ J
Step 3: Calculate the entropy change (ΔS°) at 0 °C (273.15 K) and 1 atm
We will use the following expression.
ΔS° = Qfreezing/T
ΔS° = -1.7 × 10³ J/273.15 K = -6.1 J/K
Single replacement.
Mg replaces the H in HCl to become MgCl2.
The concentrations of reactants and the products are not constant and the rates of the forward and reverse reactions are equal. and these reactions are not at equilibrium.
<u>Explanation:</u>
The conditions to attain equilibrium is that,
- Conversion of reactant to product and vice versa occurs at the same rate.
- The system is a closed system.
- The temperature remains constant.
- Concentration of every substance remains constant.
- Rate of forward and reverse reactions will be different.
So the answer is The concentrations of reactants and the products are not constant and the rates of the forward and reverse reactions are equal.
