CHM301
Which one of the following statements regarding energy is false?
Answer: the energy stored in chemical bonds is referred to as kinetic energy
A system suffers an increase in internal energy of 80 J and at the same time has 50 J of work done on it. What is the heat change of the system?
Answer: +30 j
All of the following have a standard heat of formation value of zero at 25oC and 1.0 atm except:
Answer: h(g)
Which one of the following statements describes a path function?
Answer: a property of a system that depends on the path taken between the initial and final states
A 5.000 g sample of methanol, CH3OH, was combusted in the presence of excess oxygen in a bomb calorimeter conaining 4000 g of water. The temperature of the water increased from 24.000 /(^{o}C /) to 29.765 /(^{o}C/). The heat capacity of the calorimeter was 2657 /(J/^{o}C/). The specific heat of water is /(4.184 J/g^{o}C/). Calculate /(Delta/)E for the reaction in kJ/mol.
Answer: -314 kJ/mol
Which statement is incorrect?
Answer: for an endothermic process, h is negative.
Which one of the following statements regarding energy is false?
Answer: the energy stored in chemical bonds is referred to as kinetic energy
At a constant temperature, an ideal gas is compressed from 6.0 liters to 4.0 liters by a constant external pressure of 5.0 atm. How much work is done on the gas?
Answer: w = +10 liter atm
The enthalpy of combustion of glucose is -2808 kJ/mol Which one of the following statements regarding this process is false?
Answer: the products of the combustion of glucose are less stable than glucose itself
The measurement of a thermodynamics property known as temperature is based on
Answer: zeroth law of thermodynamicsâ ââââââââ
Which one of the following statements best describes the enthalpy change of a reaction?
Answer: the difference between the energy released by bond formation and the energy consumed by bond cleavage during a chemical reaction
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