The rate constant k of the second-order reaction ch3cho→ch4+co is 6.73×10−3lmol s. the concentration of ch3cho at t=50.0 seconds is 0.151 mol/l. what was the initial concentration of ch3cho?

The initial concentration of ethanal was 0.1590 mol/L.

Explanation:

Integrated rate law for second order kinetic:

k = Rate constant =

t = Time elapsed  = 50.0 s

=initial concentration of ethanal

[A] = Concentration of ethanal left after time t = 0.151 mol/L

On substituting the value:

The initial concentration of ethanal was 0.1590 mol/L.

- both b and d.

-since b and d are the closest coastlines then that makes it the most affected.

< 3

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.