A 4.31-g sample of octane is burned in a bomb calorimeter containing 2.00 × 10² g H2O. How much energy, in cal, is released if the water temperature increases 5.46 °C? Express your answer in scientific notation. Enter your answer in the provided box. x 10 (select) cal

Historically, naphthalene was used as the main ingredient in mothballs and is easily recognized by its characteristic smell. When 0.500 g of naphthalene (C10H8) is burned in a bomb calorimeter, the temperature increased from 20.0 °C to 26.4 °C. The heat capacity of the calorimeter is 420 J/°C. Calculate the heat of combustion of naphthalene in kJ/mol.

A sample of 23.9 g of ammonium nitrate, NH,NO3, was dissolved in 133.8 g of water in a coffee cup calorimeter. The temperature changed from 28.10 °C to 17.42 °C. Calculate the heat of solution of ammonium nitrate in kJ/mol. Assume that the energy exchange involves only the solution and that the specific heat of the solution is 4.18 J/g°C. Heat of solution = i kJ/mol eTextbook and Media Save for Later Attempts: 0 of 2 used Submit Answer ype'here to search a 回D 中 ho 米 10 144 insert prt sc @ %23 %24 3 6. 7 8. backsp R Y A S D G H K pause C V B N ||M. alt ctrl alt

Coal power plants burn large amounts of coal, C(s), in an O2(g) atmosphere to generate electricity. The chemical reaction responsible for producing this energy is shown below: C(s) + O2(g) → CO2(g) Determine the mass in grams of CO2 produced when 102 metric tons of C(s) are completely burned in an O2 atmosphere (1 metric ton = 103 kg = 106 g). Don't include units in your answer