At constant pressure, 100j heat energy has been delivered to 8 gm of oxygen. what is the change of internal energy? how much work has been done by the gas? (moler heat capacity of oxygen at constant pressure, cp=29.1 j. mol-1.k-1. r=8.314 j. mol-1.k-1.)
can't solve that there any information missing? : / in advance.

Ais the

This is the answer of your question

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.