Thermo Unit 4 Practice Quiz

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Thermo unit practice questions

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Aimee Romero

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Thermo Unit 4 Practice QuizVersión en línea Thermo unit practice questions por Aimee Romero 1 A chemical system releases 40 kJ of heat to its surroundings while pressure exerted on the system performs 20 kJ of work on it. What is the change in internal energy of the system? a -60 kJ b -20 kJ c +20 kJ d +60 kJ 2 A system absorbs 450 kJ of heat during a reaction while also doing 900 J of work. Calculate the change in internal energy of the system in kJ. a +1350 kJ b -450.9 kJ c -1350 kJ d +449.1 kJ 3 What is the change in temperature of a sample of methane (C = 35.31 J/K∙mol) if the same amount of heat increases the temperature of an equal amount of diamond (C = 6.11) by 60°C? a 20°C b 6°C c 10°C d 30°C 4 A 10 g sample of Compound A is heated from 25°C to 75°C using 1500 J of energy. A second 10 g sample of Compound B requires only 600 J to have the same temperature change. Which of the following conclusions is most accurate? a Compound A has a higher specific heat capacity than Compound B. b Compound B has a higher specific heat capacity than Compound A. c The temperature change is too small to determine anything about specific heat. d Both have the same specific heat capacity due to equal masses. 5 QT4.6 Q1: Calculate the work done when a piston decreases in volume from 6 L to 2 L against a constant 3 atm of pressure. a 24 L atm of work done on the system b 12 L atm of work done on the system c 12 L atm of work done by the system d 24 L atm of work done by the system 6 QT4.6 Q2: Calculate the work done in Joules when a piston increases in volume from 1 L to 7 L against a constant 5 atm of pressure. There are 100 J in a single L∙atm. a 3 J of work done by the system b 3 J of work done on the system c 3 kJ of work done on the system d 3 kJ of work done by the system

Thermo Unit 4 Practice QuizVersión en línea

Thermo unit practice questions

por Aimee Romero

A chemical system releases 40 kJ of heat to its surroundings while pressure exerted on the system performs 20 kJ of work on it. What is the change in internal energy of the system?

-60 kJ

-20 kJ

+20 kJ

+60 kJ

A system absorbs 450 kJ of heat during a reaction while also doing 900 J of work. Calculate the change in internal energy of the system in kJ.

+1350 kJ

-450.9 kJ

-1350 kJ

+449.1 kJ

What is the change in temperature of a sample of methane (C = 35.31 J/K∙mol) if the same amount of heat increases the temperature of an equal amount of diamond (C = 6.11) by 60°C?

20°C

6°C

10°C

30°C

A 10 g sample of Compound A is heated from 25°C to 75°C using 1500 J of energy. A second 10 g sample of Compound B requires only 600 J to have the same temperature change. Which of the following conclusions is most accurate?

Compound A has a higher specific heat capacity than Compound B.

Compound B has a higher specific heat capacity than Compound A.

The temperature change is too small to determine anything about specific heat.

Both have the same specific heat capacity due to equal masses.

QT4.6 Q1: Calculate the work done when a piston decreases in volume from 6 L to 2 L against a constant 3 atm of pressure.

24 L atm of work done on the system

12 L atm of work done on the system

12 L atm of work done by the system

24 L atm of work done by the system

QT4.6 Q2: Calculate the work done in Joules when a piston increases in volume from 1 L to 7 L against a constant 5 atm of pressure. There are 100 J in a single L∙atm.

3 J of work done by the system

3 J of work done on the system

3 kJ of work done on the system

3 kJ of work done by the system

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Thermo Unit 4 Practice Quiz

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Thermo Unit 4 Practice QuizVersión en línea

por Aimee Romero

A chemical system releases 40 kJ of heat to its surroundings while pressure exerted on the system performs 20 kJ of work on it. What is the change in internal energy of the system?

A system absorbs 450 kJ of heat during a reaction while also doing 900 J of work. Calculate the change in internal energy of the system in kJ.

What is the change in temperature of a sample of methane (C = 35.31 J/K∙mol) if the same amount of heat increases the temperature of an equal amount of diamond (C = 6.11) by 60°C?

A 10 g sample of Compound A is heated from 25°C to 75°C using 1500 J of energy. A second 10 g sample of Compound B requires only 600 J to have the same temperature change. Which of the following conclusions is most accurate?

QT4.6 Q1: Calculate the work done when a piston decreases in volume from 6 L to 2 L against a constant 3 atm of pressure.

QT4.6 Q2: Calculate the work done in Joules when a piston increases in volume from 1 L to 7 L against a constant 5 atm of pressure. There are 100 J in a single L∙atm.

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