![Anshuman2002](/avatars/15603.jpg)
Anshuman2002
30.08.2019 •
Chemistry
Manganese metal can be obtained by the reaction of manganese dioxide with aluminium. 4al(s)+3mno2(s) 2 al2o3(s)+3 mn(s) calculate the enthalpy change of reaction. given: 2al(s)+3/2 o2(8) ao3(s) ah-1680 kj mol mn(s)+o2(g) mno2(s) -520 kj mol1. ah
Solved
Show answers
More tips
- W Work and Career What is the Most In-Demand Profession in the Modern World?...
- A Auto and Moto How Can Parking Sensors Help Drivers?...
- H Health and Medicine What is the Normal Blood Sugar Level in a Healthy Person?...
- F Food and Cooking Red Caviar: How to Choose the Best?...
- C Computers and Internet Clearing Cache: How to Speed Up Your Browser...
- S Style and Beauty How are artificial nails removed?...
- S Style and Beauty Secrets of Tying a Pareo: 5 Ways...
- F Food and Cooking Everything You Need to Know About Pasta...
Answers on questions: Chemistry
- C Chemistry Giving brainliest nitrogen gas was collected by water displacement. what was pressure of the n2 collected if the temperature was 22 ? 97 kpa127 kpa3.6 kpa5.8 kpa10.01 kpa...
- C Chemistry Aman went to a gas station and asked the attendant to inflate the low front tire. when the attendant finished, the constant(s) for the system is (are): temperature and...
- C Chemistry Use the concepts of relative abundance and relative weight to explain why carbon has an atomic mass of 12.011 amu when there are three isotopes of carbon weighing 12 amu,...
- C Chemistry An element has five isotopes. Calculate the atomic mass of this element using the information below. Show all your work. Using the periodic table, identify the element...
- C Chemistry Which substance found in fossil fuels conform a harmful acid when fuel is burned...
- C Chemistry Which isotope of beanium had the greatest effect on the calculated atomic mass for beanium? Support your answer with evidence in the form of numerical data from your data...
- C Chemistry Pls help me What do you think could make the magnetic force produced by the launcher system so much stronger in the Wednesday launch than in the Tuesday launch, even though...
- C Chemistry Need help please.......
- C Chemistry Focus Question Q: How can you light two bulbs brightly with one D- cell? PLEASE HELP!...
- H History Think about the purpose of the Geneva Conventions. Its standards are still in effect today, but not all nations or people believe they should hold true for all POWs. Is...
Ответ:
Explanation:
We have the following reaction:
And we are given thermodinamic data from the two following reactions:
According to Hess's Law, if we can somehow combine both ecuations to get the first one, we can sum both
to get the total change of enthalpy.
We identify that in the second ecuation,
is on the right side, and we want it to be on the left side. We can invert that ecuation and that means getting the opposite
:
Now, before combining both ecuations, we must get the same stoichometric coefficents present on the one we want to obtain. For that, just multiply the first one by 2 and the second one by 3, that means also multipying the corresponding
:
Now, just sum both ecuations to get the original one:
Ответ:
IS THIS ZOOM
Explanation: