A2.599 g sample of a new organic material is combusted in a bomb calorimeter. the temperature of the calorimeter and its contents increase from 25.25 ∘ c to 29.80 ∘ c. the heat capacity (calorimeter constant) of the calorimeter is 31.71 kj / ∘ c, what is the heat of combustion per gram of the material?

An external consultant recommends that a plant installs a bank of capacitors for power factor correction. this will reduce the peak electrical demand charges by an average of 93 kw every month. the plant current pays $13 per kw in peak demand charges. the capacitor bank will include 223 kw of fixed capacitors, and 183 of variable capacitors. the fixed capacitors cost $59 per kw, and the variable capacitors will cost $65 per kw. the consultant charges 21% of the equipment costs to install the capacitors. because this project will reduce the demand for the electric utility, they are prepared to provide a one-time rebate of $42 per kw of reduced demand. what is the simple payback period for this project (in years)?