Asample 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 change e?

Explanation:

ΔE = q + w

By convention, anything leaving the system is negative and anything entering the system is positive.

Data:

q = -3.30 kJ

w = -950 J = -0.950 kJ

Calculation

ΔE = -3.30 - 0.950 = -4.25 kJ

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.