Question

Dinitrogen pentoxide decomposes spontaneously. A 5.750 g sample is placed in a calorimeter whose heat capacity...

Dinitrogen pentoxide decomposes spontaneously. A 5.750 g sample is placed in a calorimeter whose heat capacity is 5.57 kJ/°C. The temperature changes from 21.05°C to 18.96°C. a) According to these results, what is the molar enthalpy of decomposition of N2O5? b) Draw a potential energy diagram of this reaction. Please show your work

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Heat asborbed by calorimeter = specific heat of calorimeter x temperature change

                                = ( 5.57) x ( 21.05-18.96) = 11.64 KJ

This is heat given by 5.75 g N2O5

Moles of N2O% = mass/molar mass ofN2O5 = 5.75/108.01 = 0.053236

Molar enthalphy = enthalphy per mole = ( 11.64 /0.053236) = - 218.7 KJ/mol   ( -ve indicates heat released)

b)

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
How does the temperature and specific heat capacity of a sample of water (the calorimeter) change...
How does the temperature and specific heat capacity of a sample of water (the calorimeter) change as a different mass or temperature of hot metal is added to it? How does the temperature and specific heat capacity of a sample of water (the calorimeter) change as the volume of water is changed? How does the molar enthalpy of dissolution change with the amount of substance added to water? How does the molar enthalpy of dissolution change with the volume of...
A 1.000g sample of benzene (C6H6) is burned in a bomb calorimeter whose total heat capacity...
A 1.000g sample of benzene (C6H6) is burned in a bomb calorimeter whose total heat capacity is 4.957 kJ/ oC. If the temperature of the calorimeter increases from 25.30 to 33.74 oC , what is the heat of combustion of the benzene per mole. Explanation please.
The combustion of 1.961 g of sucrose, C12H22O11(s), in a bomb calorimeter with a heat capacity...
The combustion of 1.961 g of sucrose, C12H22O11(s), in a bomb calorimeter with a heat capacity of 4.00 kJ/°C results in an increase in the temperature of the calorimeter and its contents from 22.92 °C to 31.00 °C. Calculate the enthalpy of combustion, Δ?c, for sucrose in kilojoules per mole. Δ?c= kJ/mol What is the internal energy change, Δ?, for the combustion of 1.961 g of sucrose in the bomb calorimeter? Δ?= kJ
0.9410 g of phenol (C6H5OH) are burned in a bomb calorimeter with a heat capacity of...
0.9410 g of phenol (C6H5OH) are burned in a bomb calorimeter with a heat capacity of 4.630 kJ/C . The temperature of the calorimeter increases by 6.590C. What is the heat of combustion (Hrxn for the process of burning) of phenol? a. -30.51 kJ/C b. -267.5 kJ/C c. -3051 kJ/mol d. none of these
A 0.727 g sample of D-ribose (C5H10O5) was placed in a bomb calorimeter (constant volume) and...
A 0.727 g sample of D-ribose (C5H10O5) was placed in a bomb calorimeter (constant volume) and ignited in the presence of excess oxygen. The temperature was observed to rise by 0.910 K. In a separate experiment, 0.825 g of benzoic acid (C6H5CO2H) is similarly ignited in the same calorimeter, and is observed to cause an increase of the temperature of 1.940 K. The internal energy of combustion of benzoic acid is -3251 kJ mol-1. (a) Calculate the heat capacity of...
A 2.300 −g sample of quinone (C6H4O2) is burned in a bomb calorimeter whose total heat...
A 2.300 −g sample of quinone (C6H4O2) is burned in a bomb calorimeter whose total heat capacity is 7.854kJ/∘C . The temperature of the calorimeter increases from 22.74 ∘C to 30.19 ∘C . Part B What is the heat of combustion per mole of quinone?
A 2.250 −g sample of quinone (C6H4O2) is burned in a bomb calorimeter whose total heat...
A 2.250 −g sample of quinone (C6H4O2) is burned in a bomb calorimeter whose total heat capacity is 7.854kJ/∘C. The temperature of the calorimeter increases from 22.04 ∘C to 29.33 ∘C. A)What is the heat of combustion per gram of quinone? B)What is the heat of combustion per mole of quinone?
1. Dinitrogen pentoxide (N2O5) decomposes to NO2 and O2 at relatively low temperatures in the reaction...
1. Dinitrogen pentoxide (N2O5) decomposes to NO2 and O2 at relatively low temperatures in the reaction 2N2O5(soln) → 4NO2(soln) + O2(g) This reaction is carried out in a CCl4 solution at 45° C. The concentrations of N2O5 as a function of time are listed in the table. Plot a graph of the concentration versus t, ln (natural log) concentration versus t, and 1/concentration versus t. Graphically, determine the order of the reaction, write the rate law and calculate the value...
1) When 1.523 g of liquid pentane (C5H12) combusts in a bomb calorimeter, the temperature rises...
1) When 1.523 g of liquid pentane (C5H12) combusts in a bomb calorimeter, the temperature rises from 23.7?C to 29.8 ?C. What is ?Urxn for the reaction in kJ/mol pentane? The heat capacity of the bomb calorimeter is 5.23 kJ/?C. 2. The enthalpy of combustion of benzoic acid (C6H5CO2H) is -3228 kJ/mol. The burning of 1.698 g of benzoic acid in a calorimeter causes the temperature to increase by 2.865.C. What is the heat capacity in kJ/C) of the calorimeter?
A 12.8 g sample of ethanol (C2H5OH) is burned in a bomb calorimeter with a heat...
A 12.8 g sample of ethanol (C2H5OH) is burned in a bomb calorimeter with a heat capacity of 5.65 kJ/°C. The temperature of the calorimeter and the contents increases from 25°C to 35°C. What is the heat of combustion per mole of ethanol? The molar mass of ethanol is 46.07 g/mol. C2H5OH (l) + 3 O2 (g) -----> 2 CO2 (g) + 3 H2O (g) ΔE = ?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT