The symbol AH represents enthalpy change Select one: O True False In a closed system, at 25°C and 1 atmosphere of pressure, a small sample of methane is combusted. All of the methane is reacted according to the following equation: CH4(9)+ 20₂(g) → CO₂(g) + 2H₂O(1) In order to determine the enthalpy change of the system, must be assumed that the products are also at 25°C and 1 atmosphere of pressure. Select one: O True O False In Question 11, the kinetic energy of the products will be the same as the kinetic energy of the reactants. Select one: O True False

Let's use our knowledge of constant volume (bomb) calorimetry to determine the heat energy in a given food sample, say a hamburger. A typical hamburger has a serving size of 105 g and consists of approximately 20% protein (21.0 g), 33% fat (34.7 g), and 47% carbohydrate (49.3 g). Assume that the heat capacity of the bomb calorimeter is 8.39 kJ K-¹, and the increase in water temperature was 13.2 K. Q5.38 Homework Unanswered How many Calories (Cal) are in the hamburger described above? Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimal e.g. 2.5E5 for 2.5 x 105) Type your numeric answer and submit Unanswered • 4 attempts left Submit

Find the molar enthalpy of combustion in kJ/mol of glucose at some temperature and pressure C6H12O6 (s) + 6 O2 (g) → 6 CO2 (g) + 6 H2O (l) given that in an experiment under the same conditions the combustion of 0.108 g of glucose raised the temperature of a calorimeter with total heat capacity C= 1.155 kJ/°C by 1.31 °C. The molar mass of glucose is 180.1 g/mol. Ignore the heat absorbed by the combustion products; assume this is negligible, and all heat went into the calorimeter itself. Give the answer with 5 or more significant figures.

12.00 g of Compound with molecular formula C4h8 are burned in a constant-pressure calorimeter containing 15.00 kg of water at 25 °C. The temperature of the water is observed to rise by 8.603 °C. (You may assume all the heat released by the reaction is absorbed by the water, and none by the Calculate the standard heat of formation of Compound X at 25 °C. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits. calorimeter itself.)

Using the standard enthalpies of formation, what is the standard enthalpy of reaction? CO(g) + H,O(g) –→ CO,(g) + H,(g) AHân = kJ

Determine the enthalpy for the production of  5.0 g of H2 in the following target equation, making use of the known equations given below. CH4 (g) + NH3 (g)     →         HCN(g) + 3H2 (g)   Using the following given equations:  N2 (g)+3H2 (g)   →    2NH3 (g)                                    ΔH=− 91.8kJ C(s)+2H2 (g)    →        CH4 (g)                                      ΔH=− 74.9kJ H2(g)  + 2C(s) +   N2 (g)     →       2HCN(g)                 ΔH= + 270.3 kJ