The law of conservation of energy states that energy cannot be created or . However, energy can be from one substance to another.

the law of conservation states that energy cannot be created nor destoyed but can be transformed from one state to another.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.