You are mixing CaCl2in water in a coffee cup calorimeter when you notice that the outer cup has a large hole in the bottom. You complete the experiment anyways and use your measured temperature change to find the enthalpy of neutralization. The reaction is exothermic. How does your calculated value compare to the actual value? Since the reaction is exothermic please state if the magnitude goes up, down or stays the same. Use equations as appropriate

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Propane is a gas commonly used to fuel gas grills and camping stoves.  The structure of propane is shown below. Write the balanced chemical equation for the combustion of propane.  Draw out lewis dot structures to represent all molecules of all products and reactants in this reaction.  The number of each molecule should be reflected in the balanced equation.  Calculate the heat of combustion for propane using the bond enthalpies in the table.  1.00 mol of propane is used to roast marshmallows.  It was determined that the amount of energy absorbed by the marshmallows was only 800 kJ.  Explain this observation.

Im doing a lab report.  were suppose to find the heat of reaction and the enthalpy of reaction. I dont understand which formulas to use. in the attachment please explain these two formulas, why are there two different ones for qrxn??? which one do I use? Can you help me calculate that and enthalpy of reaction with the following information. mass of contents of calorimeter=46.02 moles of magnesium used= .006m change in temperature = 14.1 C calorimeter constant= 5.39J/C Mg+2HCL=MgCl2+H2 This is the balanced equation right?

Show work to support your answer to this question. a) In a study of gaseous xenon, a chemist finds that 27.6 J of energy must be added to increase the temperature of 10.7 g of xenon from 22.7° C to 39.9° C.  What is the experimental specific heat value for xenon gas? b) Using the specific heat you calculated for gaseous xenon, how much heat will be required to heat the 10.7 g sample of xenon from 39.9° C to 278.9° C?

The enthalpy change for a chemical reaction is the sum of the energy consumed in breaking bonds and the energy released during bond formation. One way to determine the overall energy change for a chemical reaction is to apply Hess’s law to add together a group of reactions which can be arranged such that the chemical equations, when combined, give the overall equation we are trying to characterize.     a. Write a balanced chemical equation for the combustion of gaseous propane in gaseous oxygen to produce gaseous carbon dioxide and liquid water.      C3​H8​(g)+    O2​(g) ---->CO2​(g)+     H2​O(g)   b. Combine the following equations to determine the enthalpy change for the combustion of 1 mole of propane. Assume that solid carbon is graphite.  3C(s,graphite)+4H2​(g)--->C3​H8​(g) ΔHo = -103.8 kJ/mol   C(s,graphite)+O2​(g)--->CO2​(g) ΔHo= -393.5 kJ/mol   H2​(g)+1/2​ O2​(g)--->H2​O(g) ΔHo= -285.8 kJ/mol      kJ/mol…