2.54 × 10⁵ kJ of heat are required to fully melt a 0.834 m³ block of ice, with a density of 917 kg / m³.
<h3>What is melting?</h3>
Melting is a physical change in which solids turn into liquids.
- Step 1. Calculate the mass of ice.
We have a block of 0.834 m³ of ice with a density of 917 kg/m³.
0.834 m³ × 917 kg/m³ = 765 kg = 7.65 × 10⁵ g
- Step 2. Convert 7.65 × 10⁵ g to moles.
We will use the molar mass of water.
7.65 × 10⁵ g × (1 mol/18,02 g) = 4.24 × 10⁴ mol
- Step 3. Calculate the heat required to melt 4.24 × 10⁴ moles of water.
According to the thermochemical equation, 6.01 kJ are required to melt 1 mol of water.
4.24 × 10⁴ mol × (6.01 kJ/mol) = 2.54 × 10⁵ kJ
2.54 × 10⁵ kJ of heat are required to fully melt a 0.834 m³ block of ice, with a density of 917 kg / m³.
Learn more about melting here: brainly.com/question/40140
#SPJ1
Answer:
(A) stoichiometry
Explanation:
For example, Consider the reaction of the type ,
aA + bB-----> cC +dD
where b, a, d, and c are the stoichiometric coefficients for the balanced equation .
The equilibrium constant expression is denoted by K ,
equilibrium constant is the product's concentration each raised to the power of its corresponding stoichiometries , divided by reactant's concentration each raised to the power of its corresponding stoichiometries .
Answer:
74
Explanation: Mass number = protons + neutrons
Mass number = 33 + 41
Mass number = 74
The mass number of this atom is 74
The number of formula units in 116 g of NaCl is 1.204×10²⁴ formula units
<h3>Avogadro's hypothesis </h3>
1 mole of NaCl = 6.02×10²³ formula units
But
1 mole of NaCl = 58 g
Thus,
58 g of NaCl = 6.02×10²³ formula units
<h3>How to determine the formula units in 116 g of NaCl</h3>
58 g of NaCl = 6.02×10²³ formula units
Therefore,
116 g of NaCl = (116 × 6.02×10²³) / 58
116 g of NaCl = 1.204×10²⁴ formula units
Thus, 1.204×10²⁴ formula units are present in 116 g of NaCl
Learn more about Avogadro's number:
brainly.com/question/26141731
#SPJ1
c) The motion of water molecules causes them to leave the liquid and become a gas
Explanation:
When water evaporates, the motion of water molecules causes them to leave the liquid and become a gas. Evaporation is merely a phase change in which liquids changes to solid.
- During the process of evaporation, heat energy causes the motion of the particles or molecules to increase.
- This will then break the intermolecular forces holding them together leading to more freedom of the molecules.
- The molecules will then move from being liquids to solids.
Learn more:
Evaporation brainly.com/question/10972073
#learnwithBrainly
