In the PhET activity, “Properties of Gases”, when volume is kept the same, as the temperature is increased

A. the rate of collisions increases

B. the pressure decreases

C. the rate of collisions decreases

D. none of these are correct

In the PhET activity, “Properties of Gases”, when volume is kept the same, as the temperature is increased,  the rate of collisions increases.

Explanation:

Gases have following three characteristic properties:  

(1)  Can be compressed easily.

(2) The containers are to be filled by expanding.

(3)  More space is occupied than the liquids or solids.

According to the Property of gases in the PhET activity, at constant volume when the temperature of a gases increases, the rate of collisions increases.

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