Assuming gasoline is pure C8H180), the sign of q is because positive, all combus

Question

Assuming gasoline is pure C8H180), the sign of q is because positive, all combustion reactions are endothermic, they all release heat to their surroundings neutral, all combustion reaction are endothermic; they all release heat to their surroundings. negative, all combustion reactions are exothermic; they all release heat to their surroundings. None of the above is correct. Save Question 35 (2.93 points) d For the process H200)> H20(g) at 298 K and 1.0 atm, the change in enthalpy (delta H) is more positive than the change en energy (delta E) by 2.5 kJ/mol. What does the 2.5 KJ/mol quantity represents? The work done by the vaporiztion process in pushing back the atmosphere because when a liquid is converted into gas, there is an increase in volume. The work done by the vaporiztion process in pushing back the atmosphere because when a liquid is converted into gas, there is a decrease in volume. The work done by the sublimation process in pushing back the atmosphere because when a liquid is converted into gas, there is an increase in volume. None of the above is correct. Save Question 36 (3 points) In a coffee-cup calorimeter, 50.0 mL of 0.100 M AgNO3 and 50.0 mL of 0.100 M HCI are mixed to yield the following reaction: Ag+(aq)+ Cl-la)AgCI(s) The two solutions were initially at 22.60 oC, and the final temperature is 23.40 oC. Assuming that the combined soltion has a mass of 100.0 g and a specific heat capacity of 4.18 J/oCg, the heat loss (q) that accompanies this reaction is -330 J. True False

Explanation / Answer

1)c)negative because all combustion reactions are exothermic reactions

2)a)work done by vaporization process in pushing back the atmosphere

3

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