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Question
The standard enthalpy of formation of RbF(s) is -557.7 kJ/mol and the standard enthalpy of formation of RbF(aq, 1 m) is -583.8 kJ/mol.Which of the following statements concerning the dissolution of RbF in water is/are CORRECT?
1/ The dissolution of RbF(s) in water is endothermic.
2/ The standard enthalpy of solution of RbF(s) is +26.1 kJ/mol.
3/ The dissolution of RbF(s) in water results in an increase in the solution's temperature.
A.1 only
B.2 only
C.3 only
D.1 and 2
E.1, 2, and 3
Answer
This answer is hidden. It contains 2 characters.
Related questions
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Q:
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A.
B.
C.
D.
E.
Q:
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.
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For the reaction A B, the rate law is
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A.
B.
C.
D.
E.
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Q:
Which statement concerning relative rates of reaction is correct for the chemical equation given below?
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Q:
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Q:
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Q:
What is the half-life of a first-order reaction if it takes 4.4 10-2 seconds for the concentration to decrease from 0.50 M to 0.20 M?A.2.5 10-2 sB.3.3 10-2 sC.1.6 sD.21 sE.27 s
Q:
Hydrogen peroxide decomposes into water and oxygen in a first-order process.
H2O2(aq) H2O() + 1/2 O2(g)
At 20.0 C, the half-life for the reaction is 3.92 104 seconds. If the initial concentration of hydrogen peroxide is 0.52 M, what is the concentration after 7.00 days?
A.1.2 10-5 M
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Q:
A student analyzed a first-order reaction and obtained the graph below. Unfortunately, the student forgot to label the axes. What are the correct labels for the x and y axes? A.x axis = time, y axis = ln[A]
B.x axis = ln[time], y axis = [A]
C.x axis = ln[time], y axis = [A]
D.x axis = time, y axis = 1/[A]
E.x axis = 1/time, y axis = 1/[A]