Question

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I. Define precisely the heat of formation of a compound. 2. In this experiment, if a student had measure an incorrectly high ?? for the Mg + HCl reaction, would the ??/ of MgO() be too exothermic, not exothermic enough, or unaffected? Explain your answer 3. In this experiment, if a student had measure an incorrectly high AT for the MgO +HCl reaction, would the answer AHf of MgOs) be too exothermic, not exothermic enough, or unaffected? Explain your 4. Prove the Mg is the limiting reagent if 2.00 grams are added to 60.0 mL of 6.00M HCI. (Remember to balance the equation.) 5. If 2.00 grams of MgO are added to 60.0 mL of 1.00M HCI, which substance is the limiting reagent? (Remember to balance the equation.)

Answer 1

Heat of formation- it is defined as the heat released or absorbed for the formation of a pure compound from its respective elements at a constant pressure. And it is usually denoted by ?Hf.

Where ? represents change ,

H represents heat ,

And f represents formation.