 Thermo Chemistry Determine The Heat Of Dissolution Lab Report Anonymous
account_balance_wallet \$15

Question Description

1. In the laboratory a general chemistry student finds that when 2.47 g of CaBr2(s) are dissolved in 110.90 g of water, the temperature of the solution increases from 22.84 to 25.63 °C.

The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.79 J/°C.

Based on the student's observation, calculate the enthalpy of dissolution of CaBr2(s) in kJ/mol.

Assume the specific heat of the solution is equal to the specific heat of water.

ΔHdissolution = kJ/mol

2. In the laboratory a general chemistry student finds that when 1.99 g of CaBr2(s) are dissolved in 105.50 g of water, the temperature of the solution increases from 23.94 to 26.30 °C.

The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.82 J/°C.

Based on the student's observation, calculate the enthalpy of dissolution of CaBr2(s) in kJ/mol.

Assume the specific heat of the solution is equal to the specific heat of water.

ΔHdissolution = kJ/mol

3. Using standard heats of formation, calculate the standard enthalpy change for the following reaction.

CH4(g) + 2O2(g) CO2(g) + 2H2O(g)

4. Using standard heats of formation, calculate the standard enthalpy change for the following reaction.

NH4NO3(aq) N2O(g) + 2H2O(l)

5. A scientist measures the standard enthalpy change for the following reaction to be 2880.0 kJ :

6CO2(g) + 6 H2O(l) C6H12O6 + 6 O2(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.

6. A scientist measures the standard enthalpy change for the following reaction to be -1055.6 kJ :

2H2S(g) + 3 O2(g) 2H2O(g) + 2 SO2(g)

Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H2O(g) is kJ/mol.

Are You Sure?

An error was detected in your answer. Check for typos, miscalculations, etc. before you submit this item again.

PDaven
School: UT Austin   Attached.

Outline
Introduction
Body
Conclusion
Reference

Outline
Introduction
Body
Conclusion
Reference

Chemistry

Course name:
Student name:
Institution name:

1

1. The temperature change was observed to be 22.84 to 25.63 °C. which =25.63-22.84=
2.79°C
The heat change Q=-CΔT
Where C= - (mass of the mixture) × (specific heat of the mixture)
2.47 g +110.90 g=113.37g
Q=113.37g×1.79 J/°C×2.79°C=-566.1812J

𝑄

ΔHdissolution = 𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑚𝑜𝑙𝑒𝑠 𝑜𝑓 𝑠𝑜𝑙𝑢𝑡𝑒 =

−566....

flag Report DMCA  Review Anonymous
Thank you! Reasonably priced given the quality not just of the tutors but the moderators too. They were helpful and accommodating given my needs. Brown University

1271 Tutors California Institute of Technology

2131 Tutors Carnegie Mellon University

982 Tutors Columbia University

1256 Tutors Dartmouth University

2113 Tutors Emory University

2279 Tutors Harvard University

599 Tutors Massachusetts Institute of Technology

2319 Tutors New York University

1645 Tutors Notre Dam University

1911 Tutors Oklahoma University

2122 Tutors Pennsylvania State University

932 Tutors Princeton University

1211 Tutors Stanford University

983 Tutors University of California

1282 Tutors Oxford University

123 Tutors Yale University

2325 Tutors