Answer:
b. the heating of 10 g of liquid water from 0°C to 100°C.
Explanation:
Hello,
In this case, we must notice a., c. and d. processes are not actually absorbing heat but releasing it since cooling, freezing and condensation are processes with negative heat sign since matter changes from a state of more energy to a state of less energy. We can prove this by realizing that freezing enthalpy of water is -6.00 kJ/mol, condensation enthalpy of eater is -40.8 kJ/mol and a change of temperature from 100 °C to 0 °C is negative.
In such a way, the only process absorbing heat is b. the heating of 10 g of liquid water from 0°C to 100°C since energy must be added to the system, or absorbed by it in order to attain the heating.
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Answer:
d. 6
Explanation:
Chemical equation:
I₂ + Cl₂ + H₂O → HIO₃ + HCl
Balanced chemical equation:
I₂ + 5Cl₂ + 6H₂O → 2HIO₃ + 10HCl
Step 1:
I₂ + Cl₂ + H₂O → HIO₃ + HCl
Reactant Product
I = 2 I = 1
Cl = 2 Cl = 1
H = 2 H = 2
O = 1 O = 2
Step 2:
I₂ + Cl₂ + H₂O → 2 HIO₃ + HCl
Reactant Product
I = 2 I = 2
Cl = 2 Cl = 1
H = 2 H = 3
O = 1 O = 6
Step 3:
I₂ + Cl₂ + 6H₂O → 2 HIO₃ + HCl
Reactant Product
I = 2 I = 2
Cl = 2 Cl = 1
H = 12 H = 3
O = 6 O = 6
Step 4:
I₂ + Cl₂ + 6H₂O → 2HIO₃ + 10HCl
Reactant Product
I = 2 I = 2
Cl = 2 Cl = 10
H = 12 H = 12
O = 6 O = 6
Step 5:
I₂ + 5Cl₂ + 6H₂O → 2HIO₃ + 10HCl
Reactant Product
I = 2 I = 2
Cl = 10 Cl = 10
H = 12 H = 12
O = 6 O = 6
Answer
16g
Percent by mass= mass of solute/mass of solution * 100
Explanation: work out the equation
Solids have least energetic molecules because they are tightly packed.
<span>Hydrogen can be obtained economically as a byproduct in the electrolysis of "brine".
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A solution of sodium chloride (NaCl)and water (H2O) refers to the brine.The procedure of electrolysis includes utilizing an electric current to achieve a synthetic change and make new chemicals. The electrolysis of brine is a huge scale process used to make chlorine from salt, so three important chemicals, NaOH, Cl2, H2, can be gotten by electrolyzing brine.
