(a)
Interpretation:
The type of the system has to be identified.
Concept Introduction:
The regions of interest in which the reaction are taking place are considered as the system whereas everything else is said to be surrounding. The system is said to be open system which can exchange both matter and the energy with the surroundings. The system is said to be closed system which can exchange the energy with the surroundings but cannot exchange the matter.
(b)
Interpretation:
The type of the system has to be identified.
Concept Introduction:
Same as part (a).
(c)
Interpretation:
The type of the system has to be identified.
Concept Introduction:
Same as part (a).
(d)
Interpretation:
The type of the system has to be identified.
Concept Introduction:
Same as part (a).
(e)
Interpretation:
The type of the system has to be identified.
Concept Introduction:
Same as part (a).
(f)
Interpretation:
The type of the system has to be identified.
Concept Introduction:
Same as part (a).
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CHEM PRINCIPLES LL W/ACHIEVE ONE-SEM
- A piece of lead of mass 121.6 g was heated by an electrical coil. From the resistance of the coil, the current, and the Time the current flowed, it was calculated that 235 J of heat was added to the lead. The temperature of the lead rose from 20.4C to 35.5C. What is the specific heat of the lead?arrow_forwardWhat are the two ways that a final chemical state of a system can be more probable than its initial state?arrow_forwardWhich of the following quantities can be taken to be independent of temperature? independent of pressure? (a) H for a reaction (b) S for a reaction (c) G for a reaction (d) S for a substancearrow_forward
- Which molecule, F2, Cl2, Br2, or I2, has the weakest chemical bond?arrow_forwardWhich of the following processes will lead to a decrease in the internal energy of a system? (1) Energy is transferred as heat to the system; (2) energy is transferred as heat from the system; (3) energy is transferred as work done on the system; or (4) energy is transferred as work done by the system. (a) 1 and 3 (b) 2 and 4 (c) 1 and 4 (d) 2and3arrow_forwardA pot of cold water is heated on a stove, and when the water boils, a fresh egg is placed in the water to cook. Describe the events that are occurring in terms of the zeroth law of thermodynamics.arrow_forward
- An industrial process for manufacturing sulfuric acid, H2SO4, uses hydrogen sulfide, H2S, from the purification of natural gas. In the first step of this process, the hydrogen sulfide is burned to obtain sulfur dioxide, SO2. 2H2S(g)+3O2(g)2H2O(l)+2SO2(g);H=1124kJ The density of sulfur dioxide at 25C and 1.00 atm is 2.62 g/L, and the molar heat capacity is 30.2 J/(mol C). (a) How much heat would be evolved in producing 1.00 L of SO2 at 25C and 1.00 atm? (b) Suppose heat from this reaction is used to heat 1.00 L of the SO2 from 25C to 500C for its use in the next step of the process. What percentage of the heat evolved is required for this?arrow_forwardWhen one mol of KOH is neutralized by sulfuric acid, q=56 kJ. (This is called the heat of neutralization.) At 23.7C, 25.0 mL of 0.475 M H2SO4 is neutralized by 0.613 M KOH in a coffee-cup calorimeter. Assume that the specific heat of all solutions is 4.18J/gC, that the density of all solutions is 1.00 g/mL, and that volumes are additive. (a) How many mL of KOH is required to neutralize H2SO4? (b) What is the final temperature of the solution?arrow_forward9.29 In which case is heat added to the system: (a) E=43J , w=40J ; or (b) E=31J , w=34J ?arrow_forward
- The enthalpy of combustion of diamond is -395.4 kJ/mol. C s, dia O2 g CO2 g Determine the fH of C s, dia.arrow_forwardDefine the following terms: potential energy, kinetic energy, path-dependent function, state function, system, surroundings.arrow_forwardSuppose that you are studying kinetic energy of helium molecules: A helium weather balloon rises to an altitude of 40,000 ft; the temperature of the gas drops to 70 F. (a) Make an appropriate choice of system and surroundings and describe it unambiguously. (b) Explain why you chose the system and surroundings you did. (c) Identify transfers of energy and material into and out of the system that would be important for you to monitor in your study.arrow_forward
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