Aquantity of water was vaporized completely in a piston-cylinder apparatus at 100oc against a constant pressure of 1.00 atm. during the process, 22.6 kj of heat flowed into the system which did 1.70 kj of work on the surroundings. what is the enthalpy change of the system?

This element exists in adundance in the sun.explain how you would go about capturing sunlight.would this captured sunlight contain any of the element?

Which of these describes how heat is transferred by convection* a. sunlight travels through space without the aid of fluids or solids. b. warm air rises and takes the heat with it, eventually, it cools and sinks c. air at the equator rises and sinks at the poles. d. air molecules touch the warm ground, heating them up *not conduction

Moving force of air flows from areas of high pressure to areas of low pressure true or false