The unоfficiаl stаte fооd of Arizonа is a chimichanga, a deep fried burrito. You eat a chimichanga that contains 1500 kJ of potential energy. You walk 3 miles, which performs 900 kJ of work on the environment, and in that time you lose 500 kJ in heat transfer to the environment. What is your ΔU, taking into account these processes ONLY.