8. Thermochemistry

Which of the following chemical equations represents an exothermic reaction at 298 K?

Which of the following processes for ethanol (C2H5OH) is endothermic?

During an endothermic reaction, which of the following statements is correct?

Which of the following types of reactions release energy?

C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l), ΔH = -1,370 kJ. For the combustion of ethanol as described above, which of the following statements is true?

Which of the following is the result of an exothermic process?

What is the energy lost when 11.3 g of gold cools from 224 °C to 117 °C, given that the specific heat capacity of gold is 0.129 J/g°C?

A 0.1250-g sample of octane (C₈H₁₈) is burned in a bomb calorimeter with a heat capacity of 5.1 × 10² J/℃. The temperature inside the calorimeter increases by 11.8℃. What is the ΔE (in kJ/mol octane) for the combustion of octane?

Which of the following best describes the energy change that occurs during an endothermic reaction?

Which of the following diagrams best represents the potential energy changes during an exothermic reaction?

Which of the following compounds is formed from its elements by an exothermic reaction at 298 K and 101.3 kPa?

Which of the following best describes what happens during an exothermic reaction?

Which of the following happens during an endothermic chemical change?

Which of the following best describes the reaction Fe^{3+}(aq) + SCN^{-}(aq) → FeSCN^{2+}(aq)?