What happen at increasing pressure at constant tempreture

Options

A. Rate of Haber process decrease
B. Solubility of gas increase in liquid
C. Solubility of solid increases in liquid
D. `C_((s))+ CO_(2_((g)) to 2CO_((g))` reaction move forward

Explanation

To answer the question "What happens at increasing pressure at constant temperature?" we will analyze the effects of pressure on different chemical processes and states of matter, particularly focusing on gases and their solubility in liquids.

### Step-by-Step Solution:

1. **Understanding the Relationship Between Pressure and Volume**:
- According to Boyle's Law, at constant temperature, the volume of a gas is inversely proportional to the pressure exerted on it. This means that as pressure increases, the volume decreases.

2. **Applying Le Chatelier's Principle**:
- Le Chatelier's Principle states that if a system at equilibrium is subjected to a change in pressure, the equilibrium will shift in the direction that reduces the pressure. This typically means that the reaction will favor the side with fewer moles of gas.
- For example, in the Haber process (N₂ + 3H₂ ⇌ 2NH₃), there are 4 moles of gas on the reactant side and 2 moles on the product side. Increasing the pressure will shift the equilibrium towards the production of ammonia (NH₃), thus favoring the forward reaction.

3. **Effect on Gas Solubility**:
- According to Henry's Law, the solubility of a gas in a liquid is directly proportional to the partial pressure of that gas above the liquid. Therefore, as pressure increases, the solubility of gases in liquids also increases.

4. **Effect on Solid Solubility**:
- The solubility of solids in liquids is generally not significantly affected by changes in pressure. The solubility may change slightly depending on whether the dissolution process is exothermic or endothermic, but pressure has a minimal effect compared to temperature.

5. **Conclusion**:
- In summary, increasing pressure at constant temperature will:
- Favor reactions that produce fewer moles of gas (shift equilibrium to the right in the case of the Haber process).
- Increase the solubility of gases in liquids (according to Henry's Law).
- Have little to no effect on the solubility of solids in liquids.

### Final Answer:
- The correct statement regarding the effects of increasing pressure at constant temperature is that the solubility of gases in liquids increases, while the solubility of solids remains largely unchanged.