Sort the chemical reactions based on whether they absorb or release energy. Respiration in cells

activating a cold pack

producing electric current

photosynthesis

burning a candle

baking bread

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.

What is an aquifer for science class

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same