The Isomerization of Methylisonitrile to Acetonitrile CH₃NC(g)→ CH₃CN(g)

question 67

Multiple Choice

The isomerization of methylisonitrile to acetonitrile CH₃NC(g) → CH₃CN(g)
Is first order in CH₃NC. The half-life of the reaction is 5.20 × 10¹ s at 545 K. The rate constant when the initial [CH₃NC] is 0.030 mol L^-1 is ________ s^-1.

• A)75.1
• B)0.641
• C)0.0133
• D)1.56
• E)2.84 × 10⁴

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Definitions:

ΔH°

Denotes the standard enthalpy change of a reaction, measured under standard conditions (1 atm, 298.15 K).

Initiation Step

The first step in a chain reaction, where reactive intermediates are produced that propagate the reaction.

Free Radical Chlorination

A chemical reaction where chlorine atoms generated from molecular chlorine initiate a radical chain reaction leading to the chlorination of hydrocarbons.

ΔH°

The standard enthalpy change, indicating the heat absorbed or released in a reaction at standard conditions (1 atm, 298 K).