Download A simple calorimeter was used as a vessel to measure the heat

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Eigenstate thermalization hypothesis wikipedia, lookup

Acid–base reaction wikipedia, lookup

Spinodal decomposition wikipedia, lookup

Deoxyribozyme wikipedia, lookup

Work (thermodynamics) wikipedia, lookup

Ultraviolet–visible spectroscopy wikipedia, lookup

Equilibrium chemistry wikipedia, lookup

Electrochemistry wikipedia, lookup

Electrolysis of water wikipedia, lookup

Chemical equilibrium wikipedia, lookup

Ene reaction wikipedia, lookup

Marcus theory wikipedia, lookup

Woodward–Hoffmann rules wikipedia, lookup

Physical organic chemistry wikipedia, lookup

Photoredox catalysis wikipedia, lookup

Rate equation wikipedia, lookup

Industrial catalysts wikipedia, lookup

Catalysis wikipedia, lookup

Chemical thermodynamics wikipedia, lookup

Reaction progress kinetic analysis wikipedia, lookup

Enzyme catalysis wikipedia, lookup

George S. Hammond wikipedia, lookup

Transition state theory wikipedia, lookup

Transcript
A simple calorimeter was used as a vessel to measure the heat evolved or absorbed during the following reaction:
KOH (s) + HBr(aq)  H2O(l) + KBr(aq)
a) If a solution of HBr(aq) has a concentration of 3.00M then how many moles of HBr are in 250mL?
b) Given a starting mass of 15.00g KOH and 100.0mL of 3.00M HBr, determine the limiting reactant and
the number of moles of water produced.
c) In the reaction above the initial temperature is 21.0˚C and the final temperature is 65.8˚C. Assume the
density of KBr(aq) is 1.0g/mL.
i. Calculate ΔT for this reaction
ii. Clearly identify this reaction as exothermic or endothermic with the appropriate sign.
iii. Calculate q.
d) Determine the ΔH for this reaction in kJ/mol of H2O.
e) Calculate a percentage yield if the known value is -100.13kJ/mol.
f) Diagram a Reaction Pathway for this system. Clearly identify the energy change within the system.
Explain how this diagram supports your answer of whether it is an exothermic or endothermic reaction.
Explanation:
g) A student combines Ammonium Hydroxide and Barium Nitrate to perform a reaction. The solution
vessel felt cold to the touch. This reaction produces +126kJ of energy.
i. Write a balanced chemical equation for this reaction (double replacement with energy
included).
ii. Draw a Reaction Pathway for this system. Clearly identify the energy change within the
system.
Balanced Chemical Reaction