What is the First Law of Thermodynamics?
The First Law of Thermodynamics is that energy cannot be created or destroyed, it can only change from one form to another. For example, a boulder perched at the top of a hill has gravitational potential energy but then when it is pushed and begins to roll down the hill some of the potential energy is changed to kinetic energy. In this example no energy has been created or destroyed. The kinetic energy was always present just in the form of potential energy. Therefore, the total amount of energy in the world remains constant.
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Related Chemistry GCSE answers
All answers ▸85 cm^3 of 0.05 mol/dm^3 sulfuric acid is used to neutralise 15 cm^3 of sodium hydroxide of an unknown concentration. Given that the chemical formula of the reaction is 2NaOH + H2SO4 => NA2SO4 + 2H2O, find the concentration of the sodium hydroxide.
Why can graphite conduct electricity but diamond can not?
Calculate the atom economy of the following equation, assuming that KNO3 is the desired product. KOH + HNO3 ---> KNO3 + H2O (Mr of reactants and products, KOH - 56.1, HNO3 - 63.0, KNO3 - 101.1, H2O - 18.0)
a) Give a balanced equation for the complete combustion of butane, b) Explain how this would change if there was insufficient oxygen present, and explain the problems this causes