Write a balanced combustion reaction for C2H2 (acetylene). How did you know which products should be formed? Explain your reasoning

A. All organic compound undergo Combustion to produce CO2 and H20.

B. 2C2H2 + 5O2 —> 4CO2 + 2H20

Explanation:

All organic compounds undergoes Combustion( burning in the presence of O2) to form CO2 and H20.

When C2H2 (acetylene) undergoes Combustion, CO2 and H20 are form as illustrated below:

C2H2 + O2 —> CO2 + H20

Now, let us balance the equation.

There are 2 atoms of C on the left side and 1atom on the right side. It can be balance by putting 2 in front of CO2 as illustrated below:

C2H2 + O2 —> 2CO2 + H20

Now, there are a total of 5 atoms of O on the right side and 2atoms on the left side. It can be balance by putting 5/2 on the left side as illustrated below:

C2H2 + 5/2O2 —> 2CO2 + H20

Now, multiply through by 2 to clear the fraction as illustrated below:

2C2H2 + 5O2 —> 4CO2 + 2H20

Now, we see clearly that the equation is balanced as we have equal numbers of atoms of the different elements present on both sides of the equation.

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j