d. (2 pts) In carrying out an enthalpy balance the heat generated (or consumed)
ID: 903488 • Letter: D
Question
d. (2 pts) In carrying out an enthalpy balance the heat generated (or consumed) by any chemical reactions should be that at the reference temperature, rather than the actual temperature at which the reaction proceed. i. True ii. False e. (2 pts) When a system undergoes a change, more work is done by the system if the change is carried out reversibly, than when the change is carried out irreversibly. i. True ii. False (5pts.) In the production of metals the most important reducing agent (in terms of tons used per year by the industrialized nations) IS f. i. Hydrogen ii. Carbon i. Nutrasweet iv. Oxygen v. Sulfuric acid
Explanation / Answer
d) False.The enthalpy should be calculated at the temperature at which the reaction is occuring.
e) True, more work is done in a reversible process
f) Carbon is the most widely used reducing agent.
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