Which of the following are valid rearrangements of the heat equation? Select all that apply. A valid rearrangement means that the algebra was done correctly! This problem uses equations in the answer, so your browser needs to be able to display them properly. m-SH heat ΔΤ SH |heat-AT heat SH-AT mass =

For the reaction below (which will be labeled reaction A), the reaction enthalpy is unknown:                                                   2 B    + 3 H2    B2H6    HA  = ? Use the following thermochemical data to calculate the reaction enthalpy ΔHA: Reaction 1:       4 B + 3 O2 → 2 B2O3                               ΔH1 = –2509 kJ Reaction 2:       2 H2 + O2 → 2 H2O                          ΔH2 = –572 kJ Reaction 3:       B2H6 + 3 O2 → B2O3 + 3 H2O   ΔH3 = –2,159 kJ Calculate the enthalpy of reaction A (in kJ) and enter the numerical value in the answer box. Do not write units in the answer box. Clearly show on a paper how each reaction can be combined to equal reaction A  (multiply or reverse  each of the above reactions).complete work must be uploaded

If 0.24 mols of substance B is able to produce 137J of heat. What is the change in reaction enthalpy in J associated with the following balanced reaction. (Hint: *pay attention the the coefficient for substances B *determine the sign for heat, is it + or -). Round and report your answer to an integer without decimal place including + or- - sign. Only enter numeric value, no unit. A+2B → AB2 + heat AHren =???

A student runs two experiments with a constant-volume "bomb" calorimeter containing 1100. g of water (see sketch at right). thermometer stirrer First, a 5.500 g tablet of benzoic acid (C,H,CO, H) is put into the "bomb" and burned completely in an excess of water oxygen. (Benzoic acid is known to have a heat of combustion of 26.454 kJ/g.) The temperature of the water is observed insulation to rise from 15.00 °C to 42.56 °C over a time of 10.3 minutes. Next, 5.720 g of acetaldehyde (C2H,O} are put into the "bomb" and similarly completely burned in an excess of oxygen. This time the temperature of the water rises from 15.00 °C to 40.53 °C. chemical reaction "bomb" Use this information, and any other information you need from the ALEKS Data resource, to answer the questions below about this reaction: A "bomb" calorimeter. 2C,H,0(g) + 50, (g) 4CO, (g) + 4H,0 (g) Be sure any of your answers that are calculated from measured data are rounded to the correct number of significant digits. Note…

2. a. Determine the standard heat of formation, AH for the following reaction using the Data from the Table. C3H12 ) + 802(g) → 5CO2 + 6H₂O b. State whether the reaction is exothermic or endothermic. Explain. c. Rewrite the equation as thermochemical equations in two different ways to include the heat calculated in (2a). d. Draw a detail Energy Diagram representing the thermochemical equation in Ⓒ illustrating the the reactants and products and their positions.

1)      From the following data,              C(graphite) + O2(g) à  CO2(g)      = -393.5 kJ/mol           H2(g) + 1/2O2(g) = H2O(l)    delta H = -285.8 kJ/mol           2C2H6(g) + 7O2(g) = 4CO2(g) + 6H2O(l)    delta H = -3119.6 kJ/mol           calculate the enthalpy change for the reaction           2C(graphite) + 3H2(g) =C2H6(g)     a) –2417.2 kJ     b) –84.6 kJ     c) 2417.2 kJ     d) –3204.2 kJ