For a reaction, CaCO 3 ( s ) → CaO ( s ) + CO 2( g ) D f H °(CaO) = – 635.1 kJ mol –1 , D…
Chemistry · Class 11 · CBSE — Thermodynamics
For a reaction,
CaCO3(s) → CaO(s) + CO2(g)
DfH°(CaO) = – 635.1 kJ mol–1, DfH°(CO2) = –393.5 kJ mol–1 and DfH°(CaCO3) = –1206.9 kJ mol–1
Which of the following is a correct statement?
CaCO3(s) → CaO(s) + CO2(g)
DfH°(CaO) = – 635.1 kJ mol–1, DfH°(CO2) = –393.5 kJ mol–1 and DfH°(CaCO3) = –1206.9 kJ mol–1
Which of the following is a correct statement?
- A large amount of heat is evolved during the decomposition of CaCO3.
- Decomposition of CaCO3 is an endothermic process and heat is provided for decomposition.
- The amount of heat evolved cannot be calculated from the data provided.
- DrH° = S DfH° (reactants) – S DfH° (products)
Answer
(B) Decomposition of CaCO 3 is an endothermic process and heat is provided for decomposition.
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