Chapter 9, Problem 108AE

Interpretation Introduction

Interpretation: The value of q, w and ΔE in kJ for the compression of the balloon that is filled with He gas needs to be determined with the below conditions at constant P:

• Mass of He = 313 g
• Pressure of He = 1.00 atm
• Volume of He = 1910 L
• Molar heat capacity = 20.8 J/°C.mol
• Final temperature = 41.6 °C
• Final volume = 1643 L

Concept Introduction: At constant volume the change in heat for a system to change the internal energy is represented as ΔE or q_V. At constant pressure the change in heat for a system to change the enthalpy is represented as ΔH or q_p. From the first law of thermodynamic:

  $\begin{array}{l}\text{ΔE = q + w }\\ \text{Here:}\\ \text{q = heat}\\ \text{w = work}\\ \text{ΔE=Internal energy}\end{array}$