An engine operates in a carnot cycle that uses 1 mole of an ideal gas as the working substance and operates from a most compressed stage of 100 Nm^-2 and 327k, it expands iso thermally to a pleasure of 90Nm^-2 and then adeabatically to most expanded stage of 27k. Calculate the change in energy, the heat, the work done and the efficiency of the cycle?

given the reactants, h2so4 and koh, we are asked to determine the product(s) of the reaction. since h2so4 is an acid and koh is a base. this is a neutralization reaction, thus, the products are salt and water. 

so, h+ from h2so4 will react with oh- from koh forming h2o. k+ will also react with so4 2- forming k2so4. therefore, the balanced reaction will be:

h2so4 + 2koh > k2so4 + 2h2o

explanation:

c is the answer because when something is left after something evaporates that shows the chemical change.

b.final