Question

What is the enthalpy change of a) Mg(s) +2H+(aq)->Mg2+(aq)+H2(g) and b) Mg2+(aq)+H2O(l)->MgO(s)+2H+(aq). Also what is the...

What is the enthalpy change of a) Mg(s) +2H+(aq)->Mg2+(aq)+H2(g) and b) Mg2+(aq)+H2O(l)->MgO(s)+2H+(aq). Also what is the percent error.

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
I had to do a lab for the first two I got delta H ( do...
I had to do a lab for the first two I got delta H ( do they seem right) but my main question is how do i know if the numbers are possible or negative (for 421.42 and 133.49) Mg(s) + 2H+(aq)      -->     Mg2+(aq) + H2(g) 421.42 Mg2+(aq) + H2O (l)    -->   MgO(s) + 2H+ (aq) 133.49 ½ O2(g) + H2(g)   -->         H2O(l) -285.5 kJ/mol (given this) Mg(s) + ½ O2(g)   -->    MgO(s)
Change in enthalpy for the following specific reaction. Be sure to indicate the correct sign (-...
Change in enthalpy for the following specific reaction. Be sure to indicate the correct sign (- or +) for the change in enthalpy. Reaction: Mg (s) + 2H+ (aq) ->> Mg2+ (aq) + H2 (g). I calculated -462 kJ.mol, but the answer on my calculations sheet gives a box for the answer from run 1 in Joules, answer from run 2 in Joules, and average enthalpy in Joules. Shouldn't the enthalpy be consistent regardless of the amount of Mg used?
Determine the type of reaction. ZnCO3(s) → ZnO(s) + CO2(g) HClO4(aq) + Mg(s) → Mg(ClO4)(aq) +...
Determine the type of reaction. ZnCO3(s) → ZnO(s) + CO2(g) HClO4(aq) + Mg(s) → Mg(ClO4)(aq) + H2(g) HBr(g) + F2(g) → HF(g) + Br2(g) H2O(l) → H2(g) + O2(g) Na2S(aq) + Cd(NO3)2(aq) → CdS(s) + NaNO3(aq)
Given the following thermochemical data: ½H2(g)+AgNO3(aq) → Ag(s)+HNO3(aq) ΔH = -105.0 kJ 2AgNO3(aq)+H2O(l) → 2HNO3(aq)+Ag2O(s) ΔH...
Given the following thermochemical data: ½H2(g)+AgNO3(aq) → Ag(s)+HNO3(aq) ΔH = -105.0 kJ 2AgNO3(aq)+H2O(l) → 2HNO3(aq)+Ag2O(s) ΔH = 44.8 kJ H2O(l) → H2(g)+½O2(g) ΔH = 285.8 kJ Use Hess’s Law to determine ΔH for the reaction: Ag2O(s) → 2Ag(s)+½O2(g)
The enthalpy of the following reactions: COCl2 (g) + H2O (l)= CH2Cl2 (l) + O2 (g)...
The enthalpy of the following reactions: COCl2 (g) + H2O (l)= CH2Cl2 (l) + O2 (g) delta H = 19 kJ ; HCl (g)= 1/2 H2 (g) + 1/2 Cl2 (g) delta H = 92 kJ; CH2Cl2 (l) + H2 (g) + 3/2 O2 (g) = COCl2 (g) + 2 H2O (l) delta H = -161 kJ. Use these reactions to create a reaction pathway for the reaction of chlorine with water as shown below. Then use Hess;s law to...
Mg metal reacts with HCl to produce hydrogen gas. Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g) What volume of hydrogen at 0...
Mg metal reacts with HCl to produce hydrogen gas. Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g) What volume of hydrogen at 0 ∘C and 1.00 atm (STP) is released when 8.80 g of Mg reacts? Express your answer with the appropriate units. How many grams of magnesium are needed to prepare 5.75 L of H2 at 745 mmHg and 16 ∘C? Express your answer with the appropriate units.
Consider the reaction Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 69 ∘C , where [Fe2+]= 3.00 M and [Mg2+]= 0.210 M...
Consider the reaction Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 69 ∘C , where [Fe2+]= 3.00 M and [Mg2+]= 0.210 M . Part A What is the value for the reaction quotient, Q, for the cell? Part B What is the value for the temperature, T, in kelvins? Part C What is the value for n? Part D Calculate the standard cell potential for Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) Part E For the reaction 2Co3+(aq)+2Cl−(aq)→2Co2+(aq)+Cl2(g).  E∘=0.483 V what is the cell potential at 25 ∘C if the concentrations are [Co3+]=...
Consider the reaction Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 65 ∘C , where [Fe2+]= 3.40 M and [Mg2+]= 0.110 M...
Consider the reaction Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 65 ∘C , where [Fe2+]= 3.40 M and [Mg2+]= 0.110 M . Part A What is the value for the reaction quotient, Q, for the cell? Part B What is the value for the temperature, T, in kelvins? Part C What is the value for n? Part D Calculate the standard cell potential for Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s)
A scientist measures the standard enthalpy change for the following reaction to be -340.2 kJ :...
A scientist measures the standard enthalpy change for the following reaction to be -340.2 kJ : 2Na(s) + 2 H2O(l)2NaOH(aq) + H2(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H2O(l) is ____________kJ/mol.
Mg(s) + HCl (aq) ---> MgCl2(aq) + H2(g) Consider the above unbalanced equation. What volume of...
Mg(s) + HCl (aq) ---> MgCl2(aq) + H2(g) Consider the above unbalanced equation. What volume of H2 is produced at 340 mm Hg and 73.4°C when 0.86 g of Mg reacts with excess HCl? Use molar masses with at least as many significant figures as the data given
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT