Answer:
2H2(g) + O2(g) --------> 2H2O(g). ∆H= -242KJmol-1
Explanation:
A thermochemical equation is a balanced chemical reaction equation that includes the physical states of all reactants and products and the energy change.
As shown above, hydrogen reacted with oxygen in the gas phase to form water, an energy of 242KJ was evolved and we are required to put this in a thermochemical equation using the least coefficients.
Hydrogen reacts with oxygen to form water in the gas phase in a least ratio of 2:1 as shown in the answer.
The term 'energy evolved' in the question means that the reaction is exothermic and energy is evolved. Hence ∆H is negative as shown.
Answer:
0.1186mol Hg
Explanation:
To calculate the number of moles using the mass we divide the mass by the molar mass.
23.79g ÷ 200.59g/mol = 0.1186mol Hg
The answer is metallic bonding as this bond is the one
responsible of having to provide attraction in the electrons and atoms that
could lead of having substance to be made as a glue in order to provide
definite structure and it explains the description above.
Answer:
Explanation:
1. Calculate the energy needed
2. Convert calories to joules
