The ideal gas constant, r has several different values that could be used. which quantity causes these differences?
pressure
temperature
volume
moles

Pressure

Explanation:

The pressure is sometimes measured in different units

pressure

Explanation:

The different values of R are as follows:

R = 0.0821 liter•atm/mol•K.

R = 62.3637 L•Torr/mol•K or L•mmHg/mol•K.  

Here the different units of pressure are atm, Torr and mmHg.  

The unit of volume, temperature and moles are Liter (L), Kelvin (K) and mol respectively.

When different values of Pressure are used and expressed in different units that cause a change in the value of R.

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

it's filtration, but this is an assumption so my apologies if i got this