CALORIMETRY QUIZ **PLEASE HELP & SHOW HOW YOU GOT THE ANSWER**

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?

The fact that the total amount of energy in a system remains constant is a(n)