Compute the enthalpy change for the reaction

Assignment Help Chemistry

Reference no: EM13253791

1a) The enthalpy change for the reaction below at 25oC is -1,850 kJ (per mole of C9H20). What is the internal energy change for the reaction at 25oC?

9 CO(g) + 19 H2(g) --> C9H20(l) + 9 H2O(l)

Enter your answer in kJ (per mole of C9H20), rounded to the nearest kilojoule.

1b) When a 8.37-g mixture of methane, CH4, and ethane, C2H6, is burned in oxygen at constant pressure, 445.8 kJ of heat is liberated. What is the percentage by mass of CH4 in the mixture? The standard enthalpies of combustion for CH4 and C2H6 are -890.3 kJ mol-1 and -1569.7 kJ mol-1, respectively.

Reference no: EM13253791

Questions Cloud

How consistent are the different communications : Pick a brand and go to the Web site. Locate as many forms of communications as you can find. Conduct an informal communications audit. What do you notice? How consistent are the different communications?

Define what is w when a gas is compressed : What is w when a gas is compressed from 38.3 L to 28.8 L using a constant external pressure of 745 mmHg? (Remember to include a "+" or "-" sign as appropriate.)

In which week was the painter more productive : Last week a painter pained three houses in five days. This week she painted two houses in four days. In which week was the painter more productive?

What techniques for changing organizational culture : What are the observable artifacts, espoused values, and basic assumptions associated with Cisco's culture? Explain.

Compute the enthalpy change for the reaction : The enthalpy change for the reaction below at 25oC is -1,850 kJ (per mole of C9H20). What is the internal energy change for the reaction at 25oC

Calculate the diameter of the diaphragm : The sound intensity in front of a loudspeaker diaphragm vibrating at 2kHz is 4.3 W/m^2, with an acoustic power output of 0.3W. Calculate the diameter of the diaphragm. in cm

What is the mass percentage of acetic acid in the vinegar : A 5.00-g sample of vinegar is titrated with 0.108 MNaOH. If the vinegar requires 39.1 mL of the NaOH solution for complete reaction, what is the mass percentage of acetic acid, HC2H3O2, in the vinegar

Why has internet recruiting become so important : Why has Internet recruiting become so important? How do employees conduct Internet recruiting? What are the disadvantages of internet recruiting.

Discuss in detail some of the practices to have developed : Discuss in detail some of the practices to have developed as alternatives to the traditional work schedule of a full-time, eight-hour day at the employer's place of business? Please explain in detail why these alternatives have become increasingly..

User Account

All Pages