answer:
ionic bonds form between oppositely charged ions
explanation:
- an ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions.
- ionic bonds are formed between a cation, which is usually a metal, and an anion, which is usually a nonmetal.
- a covalent bond involves a pair of electrons being shared between atoms.
Answer is: 6,16 kJ.
1) changing temperature of ice from -25°C to 0°C.
Q₁ = m·C·ΔT
Q₁ = 18 g · 2 J/g·°C · 25°C
Q₁ = 900 J.
m(H₂O) = 1mol · 18 g/mol = 18 g.
C - <span>specific heat of ice.
</span>2) changing temperature of water from 0°C to 70°C.
Q₁ = m·C·ΔT
Q₁ = 18 g · 4,18 J/g·°C · 70°C
Q₁ = 5266,8 J.
C - specific heat of water.
Q = Q₁ + Q₂ = 900 J + 5266,8 J
Q = 6166,8 J = 6,16 kJ.
Have a wonderful day :) thanks for the points
Answer:
Explanation:
Chemical properties:
These are the properties which involve the chemical reaction.
For example:
Combustion, flammability, toxicity, enthalpy of formation etc are chemical properties.
Reaction with oxygen ( chemical property)
Conduction of heat ( chemical property)
Not flammable (chemical property)
Physical properties:
The property which not involve any chemical reaction it only involve the physical appearance of substance.
For example:
Density, odor, color, texture etc.
Smooth texture (physical property)
Reddish color ( chemical property)
Sink in water ( chemical property)
Endothermic is when the compound absorbs energy in the reaction. Exothermic is the opposite: the compound releases energy in the reaction.
