Which type of change does the statement describe? Particles rearrange into new combinations, forming new substances. There is no change in the chemical properties of the substance. Particles retain their composition and identity. The chemical properties of the substance change.
Answers
Answer :
Physical change : The change occurring in the physical properties of a substance like change in shape, size, etc. It is usually a reversible process.
Chemical change : The Change occurring in the chemical properties of a substance like change in the chemical composition of substance.
- Particles rearrange into new combination, forming new substances = Chemical change
- There is no change in the chemical properties of the substance = Physical change
- Particles retain their composition and identity = Physical change
- The chemical properties of the substance change = Chemical change
Explanation:
Synthesis reactions
Two or more reactants combine to make 1 new product.
Examples:
C(s) + O2(g) → CO2(g)
H2O(l) + SO3(g) → H2SO4(aq)
Decomposition reactions
A single reactant breaks down to form 2 or more products.
Examples:
H2CO3(aq) → H2O(l) + CO2(g)
CaCO3(s) → CaO(s) + CO2(g)
Single-replacement reactions
A single element replaces a similar element of an adjacent reactant compound.
Examples:
Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s)
Double-replacement reactions
Two ionic compounds exchange ions, producing 2 new ionic compounds.
Examples:
NaCl(aq) AgNO3(aq) → NaNO3(aq) + AgCl(s)
HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)
Combustion reactions
A single element or compound combines with oxygen gas releasing energy. This rapid oxidation is called burning.
Examples:
C(s) + O2(g) → CO2(g) + energy
2Mg(s) + O2(g) → 2MgO(s) + energy