Response: The increase in temperature is
Reasoning:
The amount of thermal energy needed to elevate the temperature of a given substance by one degree Celsius is referred to as the specific heat capacity.
Q = Heat gained by ice = 5280 J
m = mass of ice = 2.40 kg = 2400 g (1kg=1000g)
c = heat capacity of water =
Initial temperature =
Final temperature =
Temperature change ,
Substituting the values, we obtain:
Therefore, the temperature increase is
Answer:
0.008945 atm
Explanation:
In the reaction:
2H2S(g) ⇌ 2 H2(g) + S2(g)
Kp is defined as:
Where P represents the pressure of each component at equilibrium.
Starting with an initial pressure of H2S at 3.00 atm, the equilibrium concentrations are:
H2S = 3.00 atm - 2X
H2 = 2X
S2 = X
Substituting these values into the equation gives:
0 = 4X³ - 1.28x10⁻⁶X² + 1.92x10⁻⁶X - 2.88x10⁻⁶
Calculating X yields:
X = 0.008945 atm
In equilibrium, the pressure of S2 is X, so the pressure stands at 0.008945 atm
Answer: The change in enthalpy for each mole of zinc involved in the reaction is 152.4 kJ/mol.
Explanation:
First, we need to determine the moles of Zn and HCl.
The molar mass of Zn is 65 g/mole
and,
Next, we must identify the limiting reagent and the excess reagent.
The chemical reaction given is:
According to the balanced reaction we find that
1 mole of reacts with 2 moles of
Thus, 0.0206 moles of react with
moles of
This leads us to determine that is the excess reagent because the moles provided exceed the required moles, while
is limiting and restricts product formation.
Now to find the enthalpy change for each mole of zinc reacting in this reaction.
From the reaction we gather that,[ [TAG_59]]
0.0206 moles of Zn yield heat = 3.14 kJ
This implies that 1 mole of Zn generates heat =
Hence, the enthalpy change per mole of zinc involved in this reaction amounts to 152.4 kJ/mol.
Response: 1-methoxy-2,4-dinitrobenzene
Rationale:
The nitro groups exhibit a strong electron-withdrawing effect, facilitating nucleophilic substitution reactions where a substituent is replaced by a robust nucleophile like the methoxy group. The reaction's mechanism is illustrated below. The electron-withdrawing nature of the nitro group aids in the formation of the intermediate during the reaction as depicted.
