One of the cylinders in an automobile engine is heated and the piston moves allowing the gas inside to expand at constant pressure. The original volume was 19.85 mL while its original temperature was 15.0 ºC. If the final volume was 25.5 mL, calculate the final temperature in degrees Celsius.

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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