Question
Download Solution PDFRate of reaction for the equation 2HI - l2 + H2 can be expressed as
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is -1/2Δ[HI]/Δt.
Key Points
- The rate of reaction for the equation 2HI → I2 + H2 is expressed as the change in concentration of HI over time.
- Since 2 moles of HI decompose to form 1 mole each of I2 and H2, the rate of decrease of HI is twice the rate of formation of products.
- The negative sign indicates that the concentration of HI is decreasing over time.
- The factor of 1/2 accounts for the stoichiometric coefficient of HI in the balanced chemical equation, ensuring the correct rate expression.
Additional Information
- Rate of Reaction
- It is defined as the change in concentration of reactants or products per unit time.
- The rate can be expressed as the rate of disappearance of reactants or the rate of appearance of products.
- Stoichiometry
- It refers to the quantitative relationships between reactants and products in a balanced chemical equation.
- Stoichiometric coefficients are used to determine the relative amounts of substances consumed and produced in a reaction.
- Reaction Order
- It indicates the power to which the concentration of a reactant is raised in the rate law.
- Determined experimentally, it helps in understanding the dependence of the rate on reactant concentrations.
- Rate Law
- It is an equation that relates the rate of a reaction to the concentration of reactants.
- For the reaction aA + bB → cC, the rate law is usually written as Rate = k[A]^m[B]^n, where k is the rate constant and m, n are the orders of the reaction with respect to A and B, respectively.
Last updated on Dec 9, 2024
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