Most photos we see of Enya are the photos in the album booklets, or photos from magazines. As it is with all artists, Enya wears cosmetics in these photos, and sometimes the photos might be retouched to create a certain look.
Introduction Heat of formation is the enthalpy change when one mole of product is formed from its constituent elements under standard conditions. The equation for the formation of calcium carbonate from its elements under standard conditions is Ca(s)+C (graphite)+O2 (g) CaCO3(s).HfO (CO2 (g)) = -393.5 kJ mol -1 ?HfO (H2O (l)) = -285.5 kJ mol -1 Heat of formation of calcium carbonate = ?H1 + ?Hf (CO2 (g)) +?Hf (H2O (l))- ?H2 = -421+(-393.5)+(-285.5)- (-17.6) = -1082.4 kJ mol -1 In order to achieve the answer, Hess's law is used.
1) calcium carboinate decomposes to form calcium oxide plus carbon dioxide 2) calcium oxide reacts with silicon dioxide to produce calcium silicate.The correct balanced equation is written: 2CaO + SiO2 â Ca2SiO4.eport Abuse. 1) calcium carboinate decomposes to form calcium oxide plus carbon dioxide 2) calcium oxide reacts with silicon dioxide to produce calcium silicate. The correct balanced equation is written: 2CaO + SiO2 â Ca2SiO4.