Burning of fuel in air is called combustion. CH4(g) + 2O2(g)  CO2 (g)+ 2H2O(l) a) Calculate the heat of reaction for the above reaction by using the following bond energies . (3 Marks) C-H single bond is 412 kJ , O=O double bond is 496 kJ, C=O double bond is 743 kJ, H-O single bond is 463 kJ b) Draw the energy profile diagram for the above reaction .On your diagram label the • Products, Reactants • enthalpy for the reaction • activation energy, Ea.

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.

How can a mixture of salt water be separated into salt and water

C=59(f−32)the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true? a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of 59 degree celsius.a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.a temperature increase of 59 degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.a) i onlyb) ii onlyc) iii onlyd) i and ii only