One liter of gas A at 1.0 atm pressure has a temperature of 25°C while the same volume and pressure of gas B has a temperature of 50°C. What else do you know
about these two gases?
There are twice as many moles of gas B than gas A. Thing
Gas A has twice the molar mass of gas B.
Gas A has more kinetic energy than gas B.
Gas B has more kinetic energy than gas A.

c. 75.7

i think that is the right

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.