Answer:
ΔH = 200 kJ/mol
Explanation:
Step 1: Data given
activation energy (Ea) is: 450 kJ/mol
activation energy (Ea) of the reverse reaction is 250 kJ/mol
Step 2: The balanced equations
C4H10 ---> C2H6 + C2H4 Ea = 450 kJ/mol
C2H6 + C2H4 ---> C4H10 Ea = 250 kJ/mol
Step 3: Calculate ΔH
Since the reverse reaction has a lower activation energy, this means we need less reaction for the reverse reaction to happen. We can say the reaction absorbs energy, so this is the endothermic reaction.
Ea ( of the forward reaction) = ΔH + Ea (of the reverse reaction)
ΔH = Ea ( of the forward reaction) - Ea (of the reverse reaction)
ΔH = 450 kJ/mol - 250 kJ/mol
ΔH = 200 kJ/mol
Since the reactionis endothermi, ΔH is positive
Main Answer:
Given data:
Initial Pressure P1 = 570 mm hg
Initial Volume V1 = 2270 ml
Final Pressure P2 = ? mm hg
Final Volume V1 = 1250 ml
According to the ideal gas equation,
PV = constant.
P1V1 = P2V2
P2 = P1V1/V2
P2 = (570 x 2270) / 1250
P2 = 1035.12 mm hg
The final pressure at volume of 1250 ml is 1035.12 mm hg.
Explanation:
What is ideal gas equation ?
The ideal gas equation is as follows:
PV = nRT
where P = Pressure
V = Volume
n = number of moles of gas
R = Universal gas constant
T = Temperature
This ideal gas equation provides the macroscopic particles behavior of the gas. At this condition, the particles of the gas, won't be attract or repel each other. It is consider as the stable condition.
To know more about ideal gas equation, please visit:
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Answer: edge length = 3.61 cm
Explanation:
Givens
m = 369 gm
d = 7.86 gm / cm^3
v = ?
Formula
v = m / d
Solution
v = 369 / 7.86
v = 46.95 cm^3
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That's not the answer. You must take the cube root of the volume
side = cube root (46.95)
side = 3.61 cm