a spontaneous process is described by which of the following? select the correct answer below: a spontaneous process is a process that takes place without a continuous input of energy from an external source. a spontaneous process is a process which has an unpredictable outcome. a spontaneous process is a process that takes place so slowly as to be capable of changing direction in response to an infinitesimally small change in conditions. a spontaneous process is a process that requires continual input of energy from an external source.