An incandescent 60 W bulb has only a 5% efficiency and uses 600 J of energy in 10 seconds. How much thermal energy is generated by the bulb in 10 seconds

The bulb will  be generate only 30 Joules energy at 10 Second.  

Explanation:

The formula to calculate the total number of Joules of energy by the light bulb is as follows:

E (Joules) = P (Watts)  X  t (seconds)

E = 60 W  X  10 seconds

E = 600 Joules of energy

The total amount of energy generated by the light bulb every 10 Sec is 600 Joules.  If the light bulb is only 5 %  efficient , that would be 5% of the total.

600 J ×= 30 Joules

Of the total energy, the bulb will generate only 30 Joules energy at 10 Second.  

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :