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Online form 4 chemistry video lessons and lectures in Kenya

2 video lessons

• 10g of ethanol (C₂ H₅OH) were completely burnt in air. The heat evolved caused the temperature of 400cm³ of water to change from 20⁰C to 85⁰C.
  

  10g of ethanol (C₂ H₅OH) were completely burnt in air. The heat evolved caused the temperature of 400cm³ of water to change from 20⁰C to 85⁰C. Calculate the molar enthalpy of combustion of ethanol. (H = 1, C = 12, O = 16. Specific heat capacity...

  
  Form 4, Chemistry: Energy changes in chemical and physical processes

  Date posted: March 4, 2019.

• In an experiment to determine the solubility of solid Y in water at 30⁰C the following results were obtained.
  

  In an experiment to determine the solubility of solid Y in water at 30⁰C the following results were obtained. Mass of empty evaporating dish = 26.2g Mass of evaporating dish + saturated solution = 42.4g Mass of evaporating dish + dry solid = 30.4g Use the...

  
  Form 4, Chemistry: Acids,bases and salts

  Date posted: March 4, 2019.