Once more I ( @jaki01 ) let run my #chemistrychallenge under the SteemSTEM flag to support this still growing science community which in my eyes adds a lot of value to our Steemit community!

What could be more fun than activating your brain and at the same time having the opportunity to win up to 30 STEEM POWER. :-)

Rules - what are the requirements to win the prize?

The winner is the first person to post the correct solution (correct number and correct unit; solution process required). The prize for the correct answer is 30 STEEM POWER. We will send it to the winner immediately after the article is paid out (7 days after posting).

If nobody is able to determine the solution before Sunday, July 9th, 2017 at 10 pm (German time!) the prize (30 STEEM POWER) will be added to the next competition (bringing that one up to 45 STEEM POWER!).

Your Chemistry Challenge to Solve consists of four parts this time:

1. What is the correct equation for the reaction of isooctane (2,2,4-Trimethylpentane, C₈H₁₈) with oxygen O₂ to carbon dioxide CO₂ and water H₂O? (Hint: it is a redox reaction.)

2. Let’s assume that gasoline consists to 100 % of isooctane C₈H₁₈, and a car would consume exactly 5 liters gasoline when it goes over a distance of 100 kilometers. One liter of gasoline would cost 1.50 euro. How many kilometers could the car go if the driver tanks up his vehicle for exactly 45.60 euro (tank was empty before)?

3. How many kg and liters of CO₂ would be emitted by the car while going the distance you calculated in part 2?
   Given parameters:
   ρ(C₈H₁₈) ≈ 0.75 g∙cm^-3 ; molar masses: C = 12 g/mol ; H = 1 g/mol ; O = 16 g/mol ; universal gas constant R = 8.314 kPa∙l∙mol^-1∙K^-1; temperature T = 295 K (kelvin);
   air pressure p ≈ 1 bar ; 1 bar = 10⁵ Pa
   Hint: use the equation of part 1!

4. Let’s assume, the average speed of the car while going the distance which you calculated in part 2 was 100 kilometers per hour (100 km/h).
   What is the average reaction speed of dissipating isooctane v(C₈H₁₈) during this timescale?

This page is synchronized from the post: #Chemistry Challenge 5