When 0.1 mole of hcl gas is placed in a 10 L container at 25 C, the pressure is

Question

When 0.1 mole of hcl gas is placed in a 10 L container at 25 C, the pressure is about the same as observed when 0.1 mole of NH3 is placed in an identical box at the same temperature. However, when 0.05 moles of HCL and 0.05 moles nh3 are mixed in a 10 L container at 25 C, a noticeably lower pressure is observed. Explain this behavior. When 0.1 mole of hcl gas is placed in a 10 L container at 25 C, the pressure is about the same as observed when 0.1 mole of NH3 is placed in an identical box at the same temperature. However, when 0.05 moles of HCL and 0.05 moles nh3 are mixed in a 10 L container at 25 C, a noticeably lower pressure is observed. Explain this behavior. When 0.1 mole of hcl gas is placed in a 10 L container at 25 C, the pressure is about the same as observed when 0.1 mole of NH3 is placed in an identical box at the same temperature. However, when 0.05 moles of HCL and 0.05 moles nh3 are mixed in a 10 L container at 25 C, a noticeably lower pressure is observed. Explain this behavior.

Explanation / Answer

when NH3 and HCl are mixed there will be intermolecular attractions are starts between NH3 and HCl . so the NH3 and HCl molecules are comes together form NH4Cl compound

NH3 + HCl -------------> NH4Cl

number of moles of products < number of moles of reactants

we know that moles of gas directly proportinal to pressure of the gas from ideal gas equation

P V = n R T

here both temperature and volume is constant. so

P = constant x n

P = constant x moles

number moles decreases pressure also decreases.

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