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A flask is charged with 0.140 mol of A and allowed to react to form B according to the following hypothetical gas-phase reaction. A(g) → B(g) The following data are collected. times (s) Os 0 moles of A mol 0 40 0.140 0.068 80 (a) Calculate the number of moles of B at each time in the table. 0.043 120 160 0.029 0.016

A flask is charged with 0.140 mol of A and allowed to react to form B according to the following hypothetical gas-phase reaction. A(g) → B(g) The following data are collected. times (s) Os 0 moles of A mol 0 40 0.140 0.068 80 (a) Calculate the number of moles of B at each time in the table. 0.043 120 160 0.029 0.016

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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**Hypothetical Gas-Phase Reaction Analysis** A flask is charged with 0.140 mol of A and allowed to react to form B according to the following hypothetical gas-phase reaction: \[ \text{A(g)} \rightarrow \text{B(g)} \] **Data Collected:** | Times (s) | 0 | 40 | 80 | 120 | 160 | |-----------|------|------|------|------|------| | Moles of A | 0.140 | 0.068 | 0.043 | 0.029 | 0.016 | **Tasks:** (a) **Calculate the Number of Moles of B at Each Time:** - **0 s:** 0 mol ✅ - **40 s:** 0.072 mol ✅ - **80 s:** 0.025 mol ❌ - **120 s:** 0.014 mol ❌ - **160 s:** 0.013 mol ❌ (b) **Calculate the Average Rate of Disappearance of A for Each 40 s Interval (units: mol/s):** - **0 - 40 s:** 0.0018 mol/s ✅ - **40 - 80 s:** 0.000625 mol/s ✅ - **80 - 120 s:** 0.00035 mol/s ✅ - **120 - 160 s:** 0.000325 mol/s ✅ **Explanation of Data:** The table provides time intervals and corresponding moles of reactant A. The task requires calculating the product B, implying an understanding of the chemical conversion of A to B over time. The reactions are tracked at specified 40-second intervals, with computations required for both B formation and A depletion rates across these intervals. Checking calculations against correct values ensures accuracy in reaction analysis.
Transcribed Image Text:**Hypothetical Gas-Phase Reaction Analysis** A flask is charged with 0.140 mol of A and allowed to react to form B according to the following hypothetical gas-phase reaction: \[ \text{A(g)} \rightarrow \text{B(g)} \] **Data Collected:** | Times (s) | 0 | 40 | 80 | 120 | 160 | |-----------|------|------|------|------|------| | Moles of A | 0.140 | 0.068 | 0.043 | 0.029 | 0.016 | **Tasks:** (a) **Calculate the Number of Moles of B at Each Time:** - **0 s:** 0 mol ✅ - **40 s:** 0.072 mol ✅ - **80 s:** 0.025 mol ❌ - **120 s:** 0.014 mol ❌ - **160 s:** 0.013 mol ❌ (b) **Calculate the Average Rate of Disappearance of A for Each 40 s Interval (units: mol/s):** - **0 - 40 s:** 0.0018 mol/s ✅ - **40 - 80 s:** 0.000625 mol/s ✅ - **80 - 120 s:** 0.00035 mol/s ✅ - **120 - 160 s:** 0.000325 mol/s ✅ **Explanation of Data:** The table provides time intervals and corresponding moles of reactant A. The task requires calculating the product B, implying an understanding of the chemical conversion of A to B over time. The reactions are tracked at specified 40-second intervals, with computations required for both B formation and A depletion rates across these intervals. Checking calculations against correct values ensures accuracy in reaction analysis.
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