Chem 1311 exam 4 practice - Study guides, Class notes & Summaries

When a system _____________, change of E is always negative. correct answer: Gives off heat and does work The reaction 4Al(s) + 3O2(g) --> 2Al2O3(s) Delta H = -3351 kJ is ___________, and therefore heat is ___________ by the reaction. correct answer: Exothermic, released Which of the following is a statement of Hess's law? correct answer: If a reaction is carried out in a series of steps, the H∆ for the reaction will equal the sum of the enthalpy changes for the individual steps. ...

When a system _____________, change of E is always negative. correct answersGives off heat and does work The reaction 4Al(s) + 3O2(g) --> 2Al2O3(s) Delta H = -3351 kJ is ___________, and therefore heat is ___________ by the reaction. correct answersExothermic, released Which of the following is a statement of Hess's law? correct answersIf a reaction is carried out in a series of steps, the H∆ for the reaction will equal the sum of the enthalpy changes for the individual steps. For...