What is the difference between the mechanical energy balance and bernoull's equation? o the mechanical energy equation includes friction and bemoull's does not o the mechanical energy equation includes shaft work and bemouli's does not o bernoull's equation includes friction and the mechanicall energy equation does not o the mechanical energy equation includes friction and shaft work and bemoulil's does not obenouli's equation includes friction and shat work and the mechanical energy equation does not d

the temperature of the gas, in k, not celsius.

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.