At 300 K, the pressure inside a gas-filled container is 500 kPa. If the pressure inside decreases to 250 kPa, but the volume remains the same, what is the final temperature of the gas?

150 K

250 K

300 K

600 K

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

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