CH3CH2 CH₂Br "CH₂CH₂CI OH

A calorimeter is calibrated to have a heat capacity of 441.2 J/°c. 0.143 g of substance X is burned in the calorimeter and raises its temperature from 23.1 °c to 39.5°c. What is the heat of combustion of substance X in J/g?

If a "classic" SUV features a 52 gallon (197 L) gas tank and assuming complete combustion and a molecular formula of C3H18 for gasoline, how many L of air are consumed per tank of gasoline. Recall that air is 21% oxygen and assume a density of 0.78 g/mL for gasoline.

When 3.02 g of NHẠCI is dissolved in enough water to make 20.05 mL of solution, the temperature dropped from 19.8°C to 9.1°C. Calculate the enthalpy change (in kJ) when 1 mole of NH4CI is dissolved in water. The density and specific heat of water are 1.00 g/mL and 4.18 J/g°C respectively. Type your numeric answer and submit

50 g of solid sodium hydroxide is dissolved in 175 mL of water. Using a coffee-cup calorimeter, the temperature change of the water is measured to be -2.1°C.  Which equation best describes this system? NaOH(s)→NaOH(aq)  +  kJ                   NaOH(s)+ kJ →NaOH(aq)                                    NaOH(s)→NaOH(l) + kJ                 NaOH(aq)→NaOH(s) + kJ                     NaOH(aq)+ kJ →NaOH(s)                                NaOH(l)+ kJ → NaOH(s)   What is the definition of the temperature of a substance? the speed of the slowest particles in the substance, subtracted from the speed of the fastest particles.    the heat capacity of the substance times its mass    a measure of the average kinetic energy of a system the total heat content of a substance                     the speed of the fastest particles in the substance    Which statement describes an endothermic reaction? The surroundings warm up.      The system releases energy.   The potential energy of the products is less…

Write a balanced equation for the complete combustion of propane, C3⁢H8. Phases are optional.