Homework Answers
a.) correct. constant specific volume means constant density, such substances are incompressible
b.)correct. this is how specific heat is defined
c.)correct. both have the same O2 molecules, so pure substance
d.)false. water and oil are immiscible. so 2 phases
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2) Circle the correct statement s) a) A substance that has a constant specific volume is...
For the statements below, circle the all correct answer(s). Each statement has at least one, and...
For the statements below, circle the all correct answer(s). Each statement has at least one, and may have more than one , correct answer. (assume all thermodynamic quantities refer to the system, except where indicated) e. which of the following statements is TRUE concerning single-component phase equilibria? 1 at the critical point, the densities of vapor and liquid are equal 2. the triple point on a P-T phase diagram becomes a triple line on a P-V phase diagram 3. the...
Calculate the energy change for a pure substance over a temperature range. The following information is...
Calculate the energy change for a pure substance over a temperature range. The following information is given for benzene at I am: boiling point = 80.10 °C melting point = 5.500°C specific heat gas = 1.040 J/g °C AHp 80.10 °C) 393.3 Jg AH5.500 °C) - 127.4 g specific heat liquid - 1.740 J/g °C. A 21.10 g sample of liquid benzene is initially at 55.90 °C. If the sample is heated at constant pressure (P= I atm), calculate the...
Calculating specific heat capacity A constant-pressure calorimeter is often used to find the specific heat capacity...
Calculating specific heat capacity A constant-pressure calorimeter is often used to find the specific heat capacity of a substance if it is not known. A known mass of the substance can be heated and added to water of known mass and initial temperature. Since the specific heat capacity of water is known ( C s,water =4.184J/(g⋅ ∘ C)) , the amount of heat transferred to the water can be calculated by measuring the final temperature of the mixture at thermal...
Its True or False 44. When this reaction is carried out at constant volume at room...
Its
True or False
44. When this reaction is carried out at constant volume at room Tieu out at constant volume at room temperature with 1 mole of Din and sufficient oxygen, the reaction mixture gives off 1,516,000 joules of heat to its surroundings. 45. The entropy of a substance is greater as a liquid than as a solid. 46. The entropy of a substance is greater as a gas than as a liquid. 47. All reactions become more spontaneous...
1. Definitions. Fill in the blank with the LETTER of the most appropriate term from the...
1. Definitions. Fill in the blank with the LETTER of the most appropriate term from the following: A. Charles' Law B. neutralization C. heat of fusion D. Dalton's Law E. heat of vaporization F. heat capacity (specific heat) G. evaporation H. condensation I. melting J. Boyle's Law K. ideal gas law L. pressure M.PH N. Arrhenius acid S. Arrhenius base T. kinetic molecular theory states that pressure and volume are inversely proportional states that volume and absolute temperature are directly...
The state of matter for an object that has neither definite shape nor definite volume is...
The state of matter for an object that has neither definite shape nor definite volume is True or false? Juice freezing into a popsicle is an example of a physical change. freezing a liquid,boiling a liquidcondensing a gas Which of the following is a chemical change? Brass,Ammonia,Air,Carbon,Water,Gold are compounds? element is oxygen? Helium is an example of a homogeneous mixture or a compound? homogeneous mixture can it be vodka ? pure substance is water ?
QUESTION 2 A "big" Calorie (Cal) is a heat unit that is equal to the heat...
QUESTION 2 A "big" Calorie (Cal) is a heat unit that is equal to the heat required to raise the temperature of 1 g of water 1 C°. the heat needed to raise the temperature of 1 lb of water 1 F°. the food, or dietary, calorie. the heat of vaporization of 1 kg of pure water. 10 points QUESTION 3 The heat involved in the change of a solid into a liquid, or a liquid into a solid, at...
For questions (21-36), put a circle around the correct option. In the event that you feel...
For questions (21-36), put a circle around the correct option. In the event that you feel your selected answer is wrong, cross out neatly and circle the correct option. 21. Which of the following statement(s) is/are correct about an adiabatic process: a) it occurs at a constant volume (b) it occurs at both constant temperature and pressure e) it occurs with exchange of heat with its surroundings id None of the above 22. The more stable system with regard to...
TRODUCTION Chemical processes occur spontaneously when they lower the free energy of the system. The free...
TRODUCTION Chemical processes occur spontaneously when they lower the free energy of the system. The free energy at constant temperature and ressure is the Gibbs free energy, AG, which is defined as follows: AG = AH - TAS where AG is the change in free energy of the system, AH is the change in enthalpy of the system and AS is the change in entropy of the system AG, the change in free energy, must be less than zero for...
The amount of heat needed to raise the temperature of 1 mole of a substance by...
The amount of heat needed to raise the temperature of 1 mole of a substance by one Celsius degree (or, equivalently, one kelvin) is called the molar heat capacity of the system, denoted by the letter C. If a small amount of heat dQ is put into n moles of a substance, and the resulting change in temperature for the system is dT, then C=1ndQdT. This is the definition of molar heat capacity--the amount of heat Q added per infinitesimal...
Calculate the energy change for a pure substance over a temperature range. The following information is given for benzene at I am: boiling point = 80.10 °C melting point = 5.500°C specific heat gas = 1.040 J/g °C AHp 80.10 °C) 393.3 Jg AH5.500 °C) - 127.4 g specific heat liquid - 1.740 J/g °C. A 21.10 g sample of liquid benzene is initially at 55.90 °C. If the sample is heated at constant pressure (P= I atm), calculate the...
Its
True or False
44. When this reaction is carried out at constant volume at room Tieu out at constant volume at room temperature with 1 mole of Din and sufficient oxygen, the reaction mixture gives off 1,516,000 joules of heat to its surroundings. 45. The entropy of a substance is greater as a liquid than as a solid. 46. The entropy of a substance is greater as a gas than as a liquid. 47. All reactions become more spontaneous...
1. Definitions. Fill in the blank with the LETTER of the most appropriate term from the following: A. Charles' Law B. neutralization C. heat of fusion D. Dalton's Law E. heat of vaporization F. heat capacity (specific heat) G. evaporation H. condensation I. melting J. Boyle's Law K. ideal gas law L. pressure M.PH N. Arrhenius acid S. Arrhenius base T. kinetic molecular theory states that pressure and volume are inversely proportional states that volume and absolute temperature are directly...
For questions (21-36), put a circle around the correct option. In the event that you feel your selected answer is wrong, cross out neatly and circle the correct option. 21. Which of the following statement(s) is/are correct about an adiabatic process: a) it occurs at a constant volume (b) it occurs at both constant temperature and pressure e) it occurs with exchange of heat with its surroundings id None of the above 22. The more stable system with regard to...
TRODUCTION Chemical processes occur spontaneously when they lower the free energy of the system. The free energy at constant temperature and ressure is the Gibbs free energy, AG, which is defined as follows: AG = AH - TAS where AG is the change in free energy of the system, AH is the change in enthalpy of the system and AS is the change in entropy of the system AG, the change in free energy, must be less than zero for...
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