Hydrogen Iodide Decomposes at 800 K Via a Second-Order Process

question 98

Multiple Choice

Hydrogen iodide decomposes at 800 K via a second-order process to produce hydrogen and iodine according to the following chemical equation.
2 HI(g) → H₂(g) + I₂(g)
At 800 K it takes 142 seconds for the initial concentration of HI to decrease from 6.75 × 10^-2 M to 3.50 × 10^-2 M.What is the rate constant for the reaction at this temperature?

• A)5)12 × 10^-4 M^-1s^-1
• B)9)69 × 10^-2 M^-1s^-1
• C)10.3 M^-1s^-1
• D)1)95 × 10³ M^-1s^-1

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Definitions:

Fixed Overhead

Costs that do not change with the level of production or business activity, such as rent, salaries of permanent staff, and insurance.

Volume Variance

The difference between the budgeted and actual volume of units sold or produced, impacting direct materials, direct labor, and overhead costs.

Fixed Overhead

The regular, recurring expenses that are not affected by the level of business activity, such as rent, salaries, and insurance.

Budget Variance

Budget Variance is the difference between what was budgeted or planned for a particular period and what was actually spent or received.