Which of these observations are not explained by kinetic-molecular theory? X When a gas is heated, it expands.
o At very low temperatures, gases expand less for a given pressure change than they do at high
temperatures.
If the volume of a gas decreases, its pressure increases at constant temperature,
When gas is added to a rigid container, the pressure inside the container increases
RETRY
Intra

beta decay is the answer

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

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.