Concept explainers
Because solid p-dichlorobenzene,
Want to see the full answer?
Check out a sample textbook solutionChapter 12 Solutions
General Chemistry: Principles and Modern Applications (11th Edition)
- Data are given in Appendix 1 for white phosphorus, P4(s). P4(g) has the following thermodynamic values: Hf=58.9kJ/mol , S=280.0J/kmol . What is the temperature at which white phosphorus sublimes at 1 atm pressure?arrow_forwardUse the appropriate tables to calculate H for (a) the reaction between copper(II) oxide and carbon monoxide to give copper metal and carbon dioxide. (b) the decomposition of one mole of methyl alcohol (CH3OH) to methane and oxygen gases.arrow_forward1. The enthalpy of vaporization of methanol is 37.4 kJ/mol at 25°C. Molar heat capacities for liquid and gaseous methanol are 81.6 J/mol K and 43.9 J/mol·K respectively. Assume that heat capacities are the constant in this temperature range. Calculate the enthalpy of vaporization at 50 °C.arrow_forward
- In a study of glass etching, a chemist examines the reaction between sand (Sio2) and hydrogen fluoride at 150°c (given by the reaction below). Predict the effect on [SIF4] when (a) H2O(g) is removed; (b) some liquid water is added; (c) HF is removed; (d) some sand is removed. SiO2(s) + 4HF(g) = SiF,(g) + 2H2O(g) O (a) decreases; (b) decreases ; (c) decreases ; (d) no effect O (a) increases; (b) decreases ; (c) decreases ; (d) no effect O (a) increases; (b) increases; (c) decreases; (d) no effect (a) no effect; (b) decreases; (c) decreases ; (d) no effectarrow_forwardNatural gas consists primarily of methane, CH4(g).(a) Write a balanced chemical equation for the completecombustion of methane to produce CO2(g) as the onlycarbon-containing product. (b) Write a balanced chemicalequation for the incomplete combustion of methaneto produce CO(g) as the only carbon-containing product.(c) At 25 °C and 1.0 atm pressure, what is the minimumquantity of dry air needed to combust 1.0 L of CH4(g) completelyto CO2(g)?arrow_forwardThe Haber process is very important for agriculture because it converts N2(g) from the atmosphere into bound nitrogen, which can be taken up and used by plants. The Haber process reaction is N2(g) + 3 H2(g) = 2 NH3(g). The reaction is exo- thermic but is carried out at relatively high temperatures. Why?arrow_forward
- Identify what type of chemical reaction this is: H2(g) + I2(s) ≈ 2Hl(g)arrow_forwardA student experimentally determines the gas law constant, R, by reacting a small piece of magnesium with excess hydrochloric acid and then collecting the hydrogen gas over water in a eudiometer. Based L-atm on experimentally collected data, the student calculates R to equal 0.0832 mol·K L-atm Ideal gas law constant from literature: 0.08206 mol·K (a) Determine the percent error for the student's R-value. Percent error = % (b) For the statements below, identify the possible source(s) of error for this student's trial. The student notices a large air bubble in the eudiometer after collecting the hydrogen gas, but does not dislodge it. The student does not clean the zinc metal with sand paper. The student does not equilibrate the water levels within the eudiometer and the beaker at the end of the reaction. The water level in the eudiometer is 1-inch above the water level in the beaker. The student uses the barometric pressure for the lab to calculate R.arrow_forwardCalculate the pressure on top of Mt. Whitney (14,495 ft above sea level: the highest point in US excluding Alaska) where the boiling point of CH3CH2OCH2CH3 (diethyl ether) is 22.00° C. ΔHvap = 29.9 kJ/mole and the normal BP = 33.9° C. (Hint: what is the pressure at the normal boiling point?)arrow_forward
- Calculate the molar heat capacity of iron in J·mol-1·°C-1. Its specific heat is 0.4498 J·g-1·°C-1.arrow_forwardGiven that a 10.0g sample of ice at 0.0 degrees celsius melts and then the resultant water proceeds to warm to 20.0 degrees celsius, there are two separate processes (dealing with the transfer of heat) that describe the occurence. What are those two processes? (Hint one involves the specific heat of water). Determine the delta H of the following reactions: CH4 (g) +2O2(g) → CO2 (g) +2H2O(l) CH4 (g) +2O2(g) → CO2 (g) +2H2O(g) What is the numerical difference between these two values? What is the only physical difference between the two reactions? What does the numerical difference represent, in terms of the physical difference between the two reactions? A 4.00g sample of rocket fuel was combusted in a bomb calorimeter according to the following reaction: 2CH6N2(l)+ 5O2(g) → 2N2(g) +2CO2(g) + 6H2O(l) The temperature of the surrounding calorimeter increased from 25.00C to 39.50 C and the heat capacity of the calorimeter was previously determined to be 7.794KJ/c. What is the…arrow_forwardWhich substance has the higher boiling point? Explainarrow_forward
- Chemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning