The standard heat of combustion of ethane is -1540KJ mol^-1. assuming that the process is 80% efficient, what is the volume of ethane gas measured at room condition required to raise the temperature of 40.5kg of water from 25°C to 85°C (Given c water= 4.18 and 1 mole of gas occupies 24dm³ at room condition​

the right answer is c i just did the question.

it's c (engineer's do their work with mechanical stuff not on any living being)

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.