5. If you had 12 moles of CO2, how many kJ of energy would you need based on the reaction above? Show your work!

A certain chemical reaction releases 13.4/kJg of heat for each gram of reactant consumed. How can you calculate the heat produced by the consumption of 3.2kg of reactant? Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols.

4. Fuel value is the amount of energy that can be produced by the complete combustion of a material. For Gasoline, which is mostly* octane, the fuel value is 46.5 kJ/g. Write and balance the combustion equation for Octane (C3H18): How much energy can be released if 200 gram of gasoline is combusted

During an experiment a student mixed two chemicals together and noted that the beaker felt warm to the touch after the reaction was complete. In the experiment, the chemicals would be classified as the From this observation, the student concluded that the reaction was A. Which of the following energy pathway diagrams represents the chemical reaction from the student's experiment? Ep (kJ) Select one: OA OB 150 125 100 + and the beaker would be classified as the Reaction Coordinate and that the resulting change in enthalpy (AH) would have a B. 125 E 100 Reaction Coordinate Ep (kJ) 150 ◆ value.

can you please solve part c and d

Consider a hypothetical chemical reaction: A+B → C+D (In this equation A, B, C and D stand for some unknown chemical formulas.) Here is an energy diagram for the reaction: energy (kJ/mol) 400 300- 200- 100. 0 A+B C + D reaction coordinate Use the energy diagram to answer these questions. What is the heat of reaction? Is the reaction exothermic or endothermic? Are the reactants (A+B) or the products (C+D) more chemically stable? kJ/mol O Exothermic Endothermic Neither Reactants (4+B) O Products (C+D) Neither

1. A thermometer placed in a solution undergoing a chemical reaction indicates an increase in temperature as the reaction proceeds. Is this reaction endothermic or exothermic? Describe if heat energy is lost or gained from the reaction (the system) to the surroundings. What is the sign of the enthalpy change (AH) of this reaction? 2. A student performs a reaction and determines the enthalpy change (AH) to be 31.4 kJ. Will the temperature of the surrounding solution increase or decrease as a result of this chemical process? 3. If you hold 3 grams of ice in your hand at room temperature, your hand will become cold. a) Is the reaction H,O(s) – H,O(1) endothermic or exothermic? b) In which direction does heat flow?

* 00 Σ In your own words, differentiate between an endothermic and exothermic reaction in one complete sentence. $ 4 9. Ə p alt