Question

1. Which statement is incorrect?

a.	The Law of Conservation of Energy is another statement of the First Law of Thermodynamics.
b.	Energy is the capacity to do work or to transfer heat.
c.	Potential energy is the energy that a system possesses by virtue of its position or composition.
d.	Kinetic energy is the energy of motion.
e.	A process that absorbs energy from its surroundings is called exothermic.

____     2.   Which term is not correctly matched?

a.	thermodynamic state - conditions specifying the properties of a system
b.	state function - property dependent on how the process takes place
c.	endothermic - energy is absorbed
d.	universe - system plus surroundings
e.	exothermic - energy is released

____     3.   If 4.168 kJ of heat is added to a calorimeter containing 75.40 g of water, the temperature of the water and the calorimeter increases from 24.58°C to 35.82°C. Calculate the heat capacity of the calorimeter (in J/°C). The specific heat of water is 4.184 J/g•°C.

a.	315.5 J/°C
b.	25.31 J/°C
c.	55.34 J/°C
d.	622 J/°C
e.	17.36 J/°C

____     4.   How much heat is absorbed in the complete reaction of 3.00 grams of SiO₂with excess carbon in the reaction below? DH⁰for the reaction is +624.6 kJ.

SiO₂(g) + 3C(s) ® SiC(s) + 2CO(g)

a.	5.06 kJ
b.	366 kJ
c.	1.33 ´ 104 kJ
d.	31.2 kJ
e.	1.13 ´ 105 kJ

____     5.   From the following data at 25°C,

H2(g) + Cl2(g) ® 2HCl(g)	DH0 = -185 kJ
2H2(g) + O2(g) ® 2H2O(g)	DH0 = - 483.7 kJ

Calculate DH⁰ at 25°C for the reaction below. Use Hess’ law of combining equations.

4HCl(g) + O₂(g) ® 2Cl₂(g) + 2H₂O(g)

a.	+299 kJ
b.	+114 kJ
c.	-299 kJ
d.	-86.8 kJ
e.	-114 kJ

____     6.   Calculate the standard enthalpy change for the reaction below. SHOW WORK

	12NH3(g)	+ 21O2(g)	®	8HNO3(l)	+ 4NO(g)	+ 14H2O(g)
DH (kJ/mol)	-45.9	0		-133.9	91.3	-241.8

a.	+3,540 kJ
b.	-2,259 kJ
c.	-3,540 kJ
d.	- 4270 kJ
e.	- 4,650 kJ

Answer 1

Chemistry

1. Which statement is incorrect?

a.	The Law of Conservation of Energy is another statement of the First Law of Thermodynamics. CORRECT
b.	Energy is the capacity to do work or to transfer heat. CORRECT
c.	Potential energy is the energy that a system possesses by virtue of its position or composition. CORRECT
d.	Kinetic energy is the energy of motion. CORRECT
e.	A process that absorbs energy from its surroundings is called exothermic. INCORRECT (as in exothermic - energy is released)

____     2.   Which term is not correctly matched?

a.	thermodynamic state - conditions specifying the properties of a system MATCHING
b.	state function - property dependent on how the process takes place. NOT MATCHING (As state function doesn't depend on the path, they depends on final and initial position only)
c.	endothermic - energy is absorbed MATCHING
d.	universe - system plus surroundings MATCHING
e.	exothermic - energy is released MATCHING

pls repost the 6th question as it is not visible use the proper image formate

u can see here

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