Skip to main content
Chemistry LibreTexts

18.2 The First Law of Thermodynamics

  • Page ID
    6472
  • at 1.0 atm at 20°C. What is the change in internal energy for the reaction?

    1. When iron dissolves in 1.00 M aqueous HCl, the products are FeCl2(aq) and hydrogen gas. Calculate the work done if 30 g of Fe react with excess hydrochloric acid in a closed vessel at 20°C. How much work is done if the reaction takes place in an open vessel with an external pressure of 1.0 atm?

    Answer

    1. −350 J; 8.2 kJ
    • Was this article helpful?