So im getting a puppy in a bit what should i name her?

In a heat of an engine, if 700 j enters the system, and the piston does 400 j of work what is the final internal (thermal) energy of the system if the initial energy is 1,500 j

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .

Use the periodic table to determine how many grams of oxygen would be required to react completely with 859.0 g c2h2