The chemical reaction shown below is carried out in a coffee cup calorimeter. A student mixes 10.0 mL of 0.100 M H2A(aq) and 20 mL of 0.100 M NaOH(aq), both initially at 25 °C. The student records the highest temperature of 40. °C for the reaction. a) What indicates that this is an acid-base reaction? Explain your answer. b) Determine the amount of energy involved in the reaction in the coffee cup calorimeter. The density of the resulting solution is 1.00 g/mL and has the same specific heat capacity as water, 4.2 J/g °C. c) Determine the enthalpy of the reaction, in kJ/mol rxn.

No is the answer to the question

The correct answer should be a.

Use the universal gas law formula: pv = nrt now, the key word in this problem is stp, so at stp, temperature will always be 0 degrees celsius and pressure will always be 1.0 atm or 760 torr. given something is at stp, we already know the two variables pressure and temperature. the other thing we can find with the given information is moles. to find moles, just divide grams by molar mass of the element. 16.0g / 2(16.00)g/mol = 0.5 moles plug the values in to the equation pv = nrt (1.0 atm)( x ) = (0.5 )(0+273=273k) the r value is just a constant for when we use atm, liters, moles and kelvin. i'm assuming you want your answer in liters, but if you dont just move the decimal 3 to the right in your final answer. so when plugging these numbers in to your calculator and trying to find x, you get 11.20665 liters using significant figures the answer is 11.2 liters