Answer:
Temperature
Explanation:
Kinetic energy of gass molecules is directly propotional to the temperature.
The thermochemical equation is the chemical equation including the net change of enthalpy (heat).
The chemical equation for the decomposition of methanol to form methane and oxygen is:
2CH3OH --> 2CH4 + O2
The thermochemical equation is:
2CH3OH ---> 2CH4 + O2 - 252.8 kJ
Note that the heat is placed as negative at the right side because it is absorbed during the decomposition, so the environment will have 252.8 kJ less per each mole of O2 produced.
You can equivalently write:
2CH3OH + 252.8 kJ --> 2CH4 + O2
The time taken or 25% of the molecules to desorb is 2.2 seconds
<h3>What is a first order reaction?</h3>
A first order reaction is one in which the rate of reaction depends on the concentration of a single specie.
Since;
t1/2 = 0.693/k = 0.693/ 0.128 s-1
t1/2 = 5.4 secs
Using the formula;
0.693/t1/2 = 2.303/t log (No/N)
0.693/5.4 = 2.303/t log 1/0.75
0.693/5.4 = 2.303/t log
0.693/5.4 = 0.287/t
t = 2.2 seconds
Learn more about first order reaction: brainly.com/question/12446045
