A reaction has an activation energy, Ea = 41.6 kJ mol-1 at 25 °C. By how...

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Question

A reaction has an activation energy, Ea = 41.6 kJ mol-1 at 25 °C. By how...

A reaction has an activation energy, E_a = 41.6 kJ mol^-1 at 25 °C. By how many degrees must the temperature be raised in order to increase the reaction rate by a factor of 30.

A.
2.0
B.
6.0
C. 29
D.
374
E.
76

The following reaction takes place in an acidic solution

As₄O₆(s) + MnO₄^-(aq) → AsO₄^3-(aq) + Mn²⁺(aq)

In the simplest balanced equation, the coefficients for each listed species are

As₄O₆ MnO₄^- H⁺

A.
1,3,12
B. 3,5,36
C.
5,8,36
D.
5,8,30
E.
2,3,5

science chemistry

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Answer 1

Answer #1

1)
Given:
T1 = 25 oC
=(25+273)K
= 298 K
K2/K1 = 30/1
Ea = 41.6 KJ/mol
= 41600 J/mol

use:
ln(K2/K1) = (Ea/R)*(1/T1 - 1/T2)
ln(30/1) = (41600.0/8.314)*(1/298 - 1/T2)
3.4012 = 5003.6084*(1/298 - 1/T2)
T2 = 374 K
= (374-273) oC
= 101 oC

Increase in temperature = T2 - T1
= 101 oC - 25 oC
= 76 oC
Answer: E

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Answer 2

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