Question

What information is conveyed by the following equation ?
`CaCO_(3) (s) overset("Heat")to CaO(s) + CO_(2)(g)`
(Given : atomic mass of Ca = 40, C = 12, O = 16)

Answer 1

`{:(CaCO_(3) (s), overset("heat")to, " "CaO (s) +, " "CO_(2) (g)),("Calcium carbonate",, "Calcium oxide", "Carbon dioxide"),(" ""1 molecule",, " ""1 molecule", " ""1 molecule"),(" ""1 mol",, " ""1 mol", " ""1 mol"),(40 + 12 + 48 = 100g,, " "40 + 16 = 56g, " "12 + 32 = 44g):}`
The information gathered from the data given may be summed up as follows :
(i) Calcium carbonate, also called lime stone upon heating decomposes to give calcium oxide and carbon dioxide.
(ii) In terms of symbol equation, `CaCO_(3) (s)` decomposes to give `CaO(s)` and `CO_(2) g`.
(iii) 1 molecule of `CaCO_(3)` decomposes into 1 molecule of `CaO` and 1 molecule of `CO_(2)`.
(iv) 1 mole of `CaCO_(3)` decomposes into 1 mole of `CaO` and 1 mole of `CO_(2)`.
(v) 100 g of `CaCO_(3)` decompose into 56 g of `CaO and 44 g` of `CO_(2)`.