N2(g) + 20,9 → 2N02 (9) AHrxn = kJ
Calculate the enthalpy change for the above reaction given the
following information:
N2(g) + O2(g) → 2N0 (9) AHưxn - 181 kJ
2NO(g) +0,9 2N02(g) AHrxn = -115 kJ
-

answer;

18.5 seconds

explanation;

velocity is distance covered per unit time; it is given by displacement divided by time.

thus; time = displacement/velocity

total time = total displacement/velocity

total distance = 5000 meters south

total time = 5000/4.5

                  = 1111.11 seconds

but; 1 minute = 60 sec

thus; 1111.11 /60

                = 18.51 seconds

thus; the time taken is 18.5 seconds