Which of the following are parameters of the Arrhenius equation? The Arrhenius equation is: a. k equals A asterisk times e to the power of fraction b. numerator minus E subscript c. straight a over denominator R d. T end fraction end exponent

Explanation:

The Arrhenius equation is a formula for the temperature dependence of reaction rates. This equation has a vast and important application in determining rate of chemical reactions and for calculation of energy of activation.

Arrhenius equation gives the dependence of the rate constant of a chemical reaction on the absolute temperature, a pre-exponential factor and other constants of the reaction.

k = A e − E a R T , {\displaystyle k=Ae^{\frac {-E_{\rm {a}}}{RT}},}

where:

k = rate constant,

T = absolute temperature (in kelvins),

A is the pre-exponential factor, a constant for each chemical reaction. According to collision theory, A is the frequency of collisions in the correct orientation,

Ea = activation energy for the reaction (in the same units as RT),

R =  universal gas constant.

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol