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Ch.5 - Thermochemistry

Chapter 5, Problem 59a

Under constant-volume conditions, the heat of combustion of benzoic acid (C6H5O6) is 15.57 kJ/g. A 3.500-g sample of sucrose is burned in a bomb calorimeter. The temperature of the calorimeter increases from 20.94 to 24.72 °C. (a) What is the total heat capacity of the calorimeter?

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Everyone. So here we give it a 5.6 g sample. A final lien And it's burned in a bomb calorie meter and the temperature increases from 21.52 41.21°C. And I asked calculate the total heat capacity of the calorie emitter. Given that the heat of combustion of financial aid And I get a 42.35 killer jules program for this. We're gonna have negative heat of the reaction equal to the heat of the calorie emitter. Negative heat of the reaction is negative mass. The entity of the reaction in the heat of the calorie meter is the total capacity of the caliber emitter times the temperature change. It's up for the mask. 5.6 grams for the ndp of the reaction negative like 35 kill jules program. And for the total capacity of the calorie emitter. This is what we're looking for. The temperature change 41.21°C -21.52 Very Celsius, I'm gonna get 19.69 chris Celsius. So if we plug in advice into the equation are gonna get negative 5. grams. I was gonna get a 42 like 35 bill jules program. You consider total heat capacity of the calorie emitter Times 19.69 three Celsius profited by both sides On 19.69°C. For the total capacity of the calorie meter, We're gonna get 12. Hello jaws degrees Celsius. Thanks for watching my video and I hope it was helpful
Related Practice
Textbook Question

A 1.50-g sample of quinone (C6H4O2) is burned in a bomb calorimeter whose total heat capacity is 8.500 kJ/°C. The temperature of the calorimeter increases from 25.00 to 29.49 °C. (a) Write a balanced chemical equation for the bomb calorimeter reaction.

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Textbook Question

A 2.20-g sample of phenol (C6H5OH) was burned in a bomb calorimeter whose total heat capacity is 11.90 kJ/°C. The temperature of the calorimeter plus contents increased from 21.50 to 27.50 °C. (a) Write a balanced chemical equation for the bomb calorimeter reaction.

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Textbook Question

A 2.20-g sample of phenol (C6H5OH) was burned in a bomb calorimeter whose total heat capacity is 11.90 kJ/°C. The temperature of the calorimeter plus contents increased from 21.50 to 27.50 °C. (b) What is the heat of combustion per mole of phenol?

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Textbook Question

Under constant-volume conditions, the heat of combustion of benzoic acid (C6H5O6) is 15.57 kJ/g. A 3.500-g sample of sucrose is burned in a bomb calorimeter. The temperature of the calorimeter increases from 20.94 to 24.72 °C. (b) If the size of the sucrose sample had been exactly twice as large, what would the temperature change of the calorimeter have been?

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Textbook Question

Under constant-volume conditions, the heat of combustion of naphthalene (C10H8) is 40.18 kJ/g. A 2.50-g sample of naphthalene is burned in a bomb calorimeter. The temperature of the calorimeter increases from 21.50 to 28.83 °C. (c) Suppose that in changing samples, a portion of the water in the calorimeter were lost. In what way, if any, would this change the heat capacity of the calorimeter?

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Textbook Question

Consider the following hypothetical reactions: A → B ΔHI = +60 kJ B → C ΔHII = -90 kJ (b) Construct an enthalpy diagram for substances A, B, and C, and show how Hess's law applies.

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