Secrets of Product Fraction with Activation Energy

The video tutorial explains the concept of activation energy and its role in chemical reactions. It begins by converting activation energy from kilojoules to joules and temperature from Celsius to Kelvin. The tutorial then calculates the fraction of molecules that can react at a given temperature using a scientific calculator. It highlights the significance of effective collisions in reactions and demonstrates how reducing activation energy increases the number of molecules that can react. The conclusion emphasizes that lowering activation energy enhances the reaction rate by increasing the fraction of reacting molecules.

What is the activation energy in joules per mole if it is given as 50 kilojoules per mole?

• 50000 joules per mole

• 5000 joules per mole

• 500 joules per mole

• 500000 joules per mole

How is the temperature of 20°C expressed in Kelvin?

• 313 K

• 293 K

• 273 K

• 253 K

What is the fraction of effective collisions when the activation energy is 50 kJ/mol at 293 K?

• 1.20 x 10^-9

• 2.30 x 10^-8

• 3.40 x 10^-7

• 4.50 x 10^-6

What happens to the fraction of molecules that can react when the activation energy is reduced from 50 kJ/mol to 25 kJ/mol?

• It increases

• It becomes zero

• It remains the same

• It decreases

How many more molecules are able to react when the activation energy is lowered from 50 kJ/mol to 25 kJ/mol?

• 32000 more molecules

• 12000 more molecules

• 24000 more molecules

• 40000 more molecules