Question

The constant-pressure heat capacity of carbon dioxide (CO2) gas was found to vary with temperature according to the expression Cp,m (J K−1mol−1) = a + bT + cT^2, with a = 44.22 J K^-1 mol^-1, b = 8.79 x 10^-3 J K^-2 mol^-1, and c = -8.62 x 10^5 J K mol^-1. Calculate w, q, ΔU, and ΔH when 1.0 mol of CO2 gas is heated from 25.0 °C to 70.0 °C: (a) at constant pressure (equal to the pressure of the gas); and (b) at constant volume. Assume perfect gas behavior and clearly indicate your reasoning.

Name: the constant pressure heat capacity of carbon dioxide co2 gas was found to vary with temperature according to the expression cpm j k1mol1 a bt tc2 with a 4422 j k 1 mol 1 b 879 x 10 3 j k 2 30057
Uploaded: 2023-02-04T17:42:22-08:00
Duration: 5 min 1 s
Channel: Narayan Hari
Description: the constant pressure heat capacity of carbon dioxide co2 gas was found to vary with temperature according to the expression cpm j k1mol1 a bt tc2 with a 4422 j k 1 mol 1 b 879 x 10 3 j k 2 30057

          The constant-pressure heat capacity of carbon dioxide (CO2) gas was found to vary with temperature according to the expression Cp,m (J K−1mol−1) = a + bT + cT^2, with a = 44.22 J K^-1 mol^-1, b = 8.79 x 10^-3 J K^-2 mol^-1, and c = -8.62 x 10^5 J K mol^-1. Calculate w, q, ΔU, and ΔH when 1.0 mol of CO2 gas is heated from 25.0 °C to 70.0 °C: (a) at constant pressure (equal to the pressure of the gas); and (b) at constant volume. Assume perfect gas behavior and clearly indicate your reasoning.

Added by Michael J.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Narayan Hari

02/04/2023

Step 1

To do this, we use the equation Cp,m/ (J K?1mol?1) = a + bT + Tc2. a = 44.22 J K-1 mol-1 b = 8.79 x 10-3 J K-2 mol-1 c = -8.62 x 105 J K mol-1 Show more…

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The constant-pressure heat capacity of carbon dioxide (CO2) gas was found to vary with temperature according to the expression Cp,m (J K−1mol−1) = a + bT + cT^2, with a = 44.22 J K^-1 mol^-1, b = 8.79 x 10^-3 J K^-2 mol^-1, and c = -8.62 x 10^5 J K mol^-1. Calculate w, q, ΔU, and ΔH when 1.0 mol of CO2 gas is heated from 25.0 °C to 70.0 °C: (a) at constant pressure (equal to the pressure of the gas); and (b) at constant volume. Assume perfect gas behavior and clearly indicate your reasoning.