Question

A sample of NI3 is contained in a piston and cylinder. The samples rapidly decomposes to form nitrogen gas and iodine gas, and releases 3.30 kJ of heat and does

950 J of work. What is ΔE?​

Answer 1

ΔE is -4250 J

Step-by-step explanation:

Step1: Data given

3.30 kJ of heat is released

There is 950 J of work done

Step 2: Calculate ΔE

ΔE = q + w

⇒ with q = heat of energy released = 3.3 kJ = 3300 J ( negative because the heat is released)

⇒ work done = 950 J ( also negative )

ΔE = -3300J-950J= -4250 J

ΔE is -4250 J