Question
In: Mechanical Engineering
The creep rate of a viscoelastic material is measured under a load P at 25 °C...
The creep rate of a viscoelastic material is measured under a load P at 25 °C and 100 °C, respectively. What material property causes the strain rate measured at 100 °C to be greater than that measured at 25 °C? According to what relationship does this material property change with temperature?
Solutions
Expert Solution
Viscoelastic is the property of materials that exhibit both viscous and elastic characteristics when undergoing deformation.
Different Property Of Viscelastic Materials:
1. Hysteresis
2. Stress Relaxation
3. Creep
Out Of this Creep is the material Property Causes strain Rate Measured at 100 degree to be greater than that Measured At 25 Degree.
When subjected to a step constant stress, viscoelastic materials experience a time-dependent increase in strain. This phenomenon is known as viscoelastic creep.
The Relationship of this Material property with Temperature is
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give a creep plot of some material, determine (a) the
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2
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2 inches
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¼ inch
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3
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---------
QUESTION 4
One of the most...
Consider the reaction A+2B⇌C whose rate at 25 ∘C was measured using three different sets of...
Consider the reaction
A+2B⇌C
whose rate at 25 ∘C was measured using three different sets of
initial concentrations as listed in the following table:
TRIAL
[A]
(M)
[B]
(M)
RATE
(M/s)
1
.50
.30
9.0x10^-3
2
.50
.60
1.8x10^-2
3
.100
.30
3.6x10^-2
What is the rate law for this reaction? Express the rate law
symbolically in terms of k, [A], and [B].
Consider the reaction A+2B⇌C whose rate at 25 ∘C was measured using three different sets of...
Consider the reaction
A+2B⇌C
whose rate at 25 ∘C was measured using three different sets of
initial concentrations as listed in the following table:
Trial
[A]
(M)
[B]
(M)
Rate
(M/s)
1
0.50
0.010
3.0×10−3
2
0.50
0.020
6.0×10−3
3
1.00
0.010
1.2×10−2
Calculate the initial rate for the formation of C at 25 ∘C, if
[A]=0.50M and [B]=0.075M. Express your answer to two significant
figures and include the appropriate units.
Consider the reaction A+2B⇌C whose rate at 25 ∘C was measured using three different sets of...
Consider the reaction
A+2B⇌C
whose rate at 25 ∘C was measured using three different sets of
initial concentrations as listed in the following table:
What is the rate law for this reaction?
Express the rate law symbolically in terms of k , [A] ,
and [B] .
Trial
[A]
(M )
[B]
(M )
Rate
(M/s )
1
0.15
0.010
2.7×10−4
2
0.15
0.020
5.4×10−4
3
0.30
0.010
1.1×10−3
Consider the reaction A+2B⇌C whose rate at 25 ∘C was measured using three different sets of...
Consider the reaction A+2B⇌C whose rate at 25 ∘C was measured
using three different sets of initial concentrations as listed in
the following table: Trial [A] (M) [B] (M) Rate (M/s) 1 0.20 0.010
4.8×10−4 2 0.20 0.020 9.6×10−4 3 0.40 0.010 1.9×10−3 What is the
rate law for this reaction? Express the rate law symbolically in
terms of k, [A], and [B].
Calculate the initial rate for the formation of C at 25 ∘C, if
[A]=0.50M and [B]=0.075M.
Consider the reaction A+2B⇌C whose rate at 25 ∘C was measured using three different sets of...
Consider the reaction
A+2B⇌C
whose rate at 25 ∘C was measured using three different sets of
initial concentrations as listed in the following table:
Trial
[A]
(M)
[B]
(M)
Rate
(M/s)
1
0.20
0.050
2.4×10−3
2
0.20
0.100
4.8×10−3
3
0.40
0.050
9.6×10−3
Calculate the initial rate for the formation of C at 25 ∘C, if
[A]=0.50M and [B]=0.075M.
Please help!
Consider the reaction A+2B⇌C whose rate at 25 ∘C was measured using three different sets of...
Consider the reaction A+2B⇌C whose rate at 25 ∘C was measured using
three different sets of initial concentrations as listed in the
following table: Trial [A] (M) [B] (M) Rate (M/s) 1 0.30 0.030
3.2×10−3 2 0.30 0.060 6.5×10−3 3 0.60 0.030 1.3×10−2 What is the
rate law for this reaction? PART B aswell ?
Consider the reaction A+2B⇌CA+2B⇌C whose rate at 25 ∘C∘C was measured using three different sets of...
Consider the reaction
A+2B⇌CA+2B⇌C
whose rate at 25 ∘C∘C was measured using three different sets of
initial concentrations as listed in the following table:
Trial
[A][A]
(MM)
[B][B]
(MM)
Rate
(M/sM/s)
1
0.50
0.050
1.5×10−2
2
0.50
0.100
3.0×10−2
3
1.00
0.050
6.0×10−2
Part A
What is the rate law for this reaction?
Express the rate law symbolically in terms of kkk, [A][A], and
[B][B].
View Available Hint(s)
The rate law for the reaction below is given by Rate = k(P ). At 680°C,...
The rate law for the reaction below is given by Rate = k(P ). At
680°C, the half-life is 35.0 s. Given initial pressures of P = 0.67
atm, P = 0.75 atm, and P = 0.25 atm, how many seconds will it take
for the pressure of PH to drop to 0.50 atm
4 PH (g) → P (g) + 6 H (g)
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