What amount of Heat is Generated?

The standard heat of reaction is 114.1 KJ. i.e if you consume 2 moles of NO you get this much of heat energy. Atomic m of NO is 40 (14 of N + 16 of O). i.e if 80 gm (2 * 40) gm are consumed 114 KJs are produced. If 1.71 grams are consumed then (1.71/40)*114 KJ will be produced. Which is 4.87 KJ.