Asked by Blair
                1. A solution in which no more solid can be dissoved is referred to as ____.
Answer: saturated
2.At constant pressure, heat can be referred to as (entropy, enthalpy, or free energy). Answer: enthalpy
The measure of disorder or randomness of a system is(entropy, enthalpy, or free energy). Answer: entropy
The spontaneity of a reaction is indicated by the direction of change of a system's(entropy, enthalpy, or free energy). Answer: free energy
3.The color of bromocresol green indicator is ______when pH < 4, green when pH 4- 5.3 and ______in pH > 5.3.
first blank =yellow 2nd blank= blue
4.Na2B4O7+ 10H2O(s) 2Na+ (aq) + B4O5(OH)42–(aq) + 8H2O(l)
The sign of (delta)Ssys will be
A. postive
B. negative
answer:negative
because there are..
A.more
B. less
answer: more
moles of product generated.
5.The solubility of borax is directly proportional to temperature. Therefore, the sign of (delta)H is..
A. negative
B. postive
C. unknown with the given information.
answer: C.
THANK YOU!
            
        Answer: saturated
2.At constant pressure, heat can be referred to as (entropy, enthalpy, or free energy). Answer: enthalpy
The measure of disorder or randomness of a system is(entropy, enthalpy, or free energy). Answer: entropy
The spontaneity of a reaction is indicated by the direction of change of a system's(entropy, enthalpy, or free energy). Answer: free energy
3.The color of bromocresol green indicator is ______when pH < 4, green when pH 4- 5.3 and ______in pH > 5.3.
first blank =yellow 2nd blank= blue
4.Na2B4O7+ 10H2O(s) 2Na+ (aq) + B4O5(OH)42–(aq) + 8H2O(l)
The sign of (delta)Ssys will be
A. postive
B. negative
answer:negative
because there are..
A.more
B. less
answer: more
moles of product generated.
5.The solubility of borax is directly proportional to temperature. Therefore, the sign of (delta)H is..
A. negative
B. postive
C. unknown with the given information.
answer: C.
THANK YOU!
Answers
                    Answered by
            bobpursley
            
    all correct.
    
                    Answered by
            UCIANTEATER
            
    #4 i put negative but i got it wrong
    
                    Answered by
            Anonymous
            
    the answer to #4 should be POSITIVE & MORE ... the more moles produced, the greater the entropy, thus higher delta S
    
                    Answered by
            Anonymous
            
    5 is c
    
                    Answered by
            Anonymous
            
    5 is B
    
                    Answered by
            UCI student
            
    yea, #5 is fosho B
    
                    Answered by
            Anonymous
            
    thanks a lot. i got #5 wrong. it's not B
    
                    Answered by
            lol
            
    The answer is B. 100%
    
                    Answered by
            me
            
    LIES!!!!!!!!!!!!
    
                    Answered by
            CHRIS
            
    5 is A
    
                    Answered by
            sammy
            
    no 5 is c!
    
                    Answered by
            JUSTBEINGME
            
    wow... there are so many idiots on this sites because the answer is D!!!
    
                    Answered by
            THE TRUTH!!!!
            
    okay forget what everyone else is saying. i just submitted my answer and B IS RIGHT. TRUST ME :)
    
                    Answered by
            Anonymous
            
    i am not an iddiot
    
                    Answered by
            Diem
            
    all of you who says B are just trying to screw everyone else's hw score over -__-
    
                    Answered by
            tired of all the wrong help
            
    I didn't even bother reading the opinions about number 5 because they were too annoying, so I just thought about it myself and B, positive, is definitely the right choice because if borax is directly proportional to temperature, that means the more heat we add, the more the borax will dissolve in the water. When you add heat to a reaction, it makes the reaction endothermic and is therefore a positive delta H. If a reactions loses heat then it is a negative delta H. Oh and I just submitted it, and B positive is right. 
    
                    Answered by
            Anonymous
            
    (4 pts) The concentration and volume of reagents combined in each trial are listed in the table below:
Trial 00020 M 00020 M H2O(mL)
Fe(NO3)3 (mL) KSCN (mL)
1 5 2 3
2 5 3 2
3 5 4 1
4 5 5 0
Initially (right after combining and before any reaction occurs) the concentration of SCN– in trial 1 is
M.
    
Trial 00020 M 00020 M H2O(mL)
Fe(NO3)3 (mL) KSCN (mL)
1 5 2 3
2 5 3 2
3 5 4 1
4 5 5 0
Initially (right after combining and before any reaction occurs) the concentration of SCN– in trial 1 is
M.
                    Answered by
            Girl
            
    I put C for #5 and got it wrong it is not C
    
                    Answered by
            CHeem
            
    not so helpful peers lol
    
                    Answered by
            lillian
            
    No u guys 5 really is B.. I wish i read these coments before putting C.. I regret it cuz C was seriouslyy wrong.. its positive. =D y would i try to screw everyone??? that's just mean. 
    
                    Answered by
            a
            
    5 is positive
    
                    Answered by
            el cucuy
            
    5 is def. not c..i got it wrong
    
                    Answered by
            Anonymous
            
    5 is positive! for me, positive was a. that's probably why some people got it wrong (:
    
                    Answered by
            Stephanie
            
    5 is B. I really find it mean that people deliberately put the wrong answers on this site. Is the pursuit of a decimal's worth of increased standing in the class distribution really worth lessening your character? Why can't we just help each other out fairly?
    
                    Answered by
            Foxyfresh
            
    #5: is Positive. It's not A, B, or C. Your question may be worded differently. But the correct answer should be "positive" for change in enthalpy. I did the lab, and my calculation supports it! 
    
                    Answered by
            Anonymous
            
    At constant pressure, heat can be referred to as  (entropy) Read about entropy
The measure of disorder or randomness of a system is . (ethalpy) Definition of Entropy
The spontaneity of a reaction is indicated by the direction of change of a system's (free energy) Process of elimination if you want
Solid borax dissolves in water according to the equation:
Na2B4O7 10H2O(s) 2Na+ (aq) + B4O5(OH)42–(aq) + 8H2O(l)
 
The sign of Ssys will be If dS>0 then more molecules are produced. Look at the eqauation, 1 mole to start and 11 to finish. Go back to the definition of entropy about disorder.
A. positive
because there are: Simple math 1 to 11 moles
A. more
The solubility of borax is directly proportional to temperature. Therefore, the sign of H is: We added heat so it is endothermic. Endothermic reactions are +. Exo is negative.
A. positive
 
Note: You can earn partial credit on this problem.
You have attempted this problem 1 time.
Your overall recorded score is 100%.
You have 0 attempts remaining.
Don't listen to majority of the comments. I am 100% correct.
    
The measure of disorder or randomness of a system is . (ethalpy) Definition of Entropy
The spontaneity of a reaction is indicated by the direction of change of a system's (free energy) Process of elimination if you want
Solid borax dissolves in water according to the equation:
Na2B4O7 10H2O(s) 2Na+ (aq) + B4O5(OH)42–(aq) + 8H2O(l)
The sign of Ssys will be If dS>0 then more molecules are produced. Look at the eqauation, 1 mole to start and 11 to finish. Go back to the definition of entropy about disorder.
A. positive
because there are: Simple math 1 to 11 moles
A. more
The solubility of borax is directly proportional to temperature. Therefore, the sign of H is: We added heat so it is endothermic. Endothermic reactions are +. Exo is negative.
A. positive
Note: You can earn partial credit on this problem.
You have attempted this problem 1 time.
Your overall recorded score is 100%.
You have 0 attempts remaining.
Don't listen to majority of the comments. I am 100% correct.
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