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calculate the minimum amount of work that must be done to remove 100 J of heat form the inside of the refrigerator, when inside the temperature is -80 C , and the outside temperature is 20 C. And plot the minimum amount of work that must be done to remove 100 J of heat from the inside of the refrigerator when the inside temperature is -80 C as a function of external temperature (from 0 C to 40 C). use this result to comment on the impact of high room temperatures on ultra low freezers.
An alloy, initially weighing 50 grams, contains 90 atomic% silver and 10 atomic% copper. How many grams of copper would have to be added to make the alloy 12 atomic% copper?
The mole fraction of water in the product gas is monitored and found to have the value calculated in part (a) for the first 10hours of operation, but then it begins to increase. What is the most likely cause of the increase? If the process continu..
Given: 2 NH3(g)N2(g) + 3H2(g); H = + 91.8 kJ/mol rxn 1. (1) What is qp value for one mol rxn.? 2. (1) Is this exo- or endothermic? 3. (1) Which element is reduced? 4. (2) What is enthalpy change per mol NH3?
What is the mass in grams for each of the following: a) 5.12 mol of Al, b) .75 mol of Cu, c) 3.52 mol of MgBr2, d) 0.145l of C2H6O, e) 2.08 mol of (NH4)2SO4.
Chemistry - Estimation of Mass Required in a Reaction, With the reaction, CaCO3+2Hcl->CaCl2+H2O+CO2. Using percent by mass what is the weight of HCl needed to react
An engineer was trying to minimize greenhouse gases from car exhaust and was studying the gases that come from the trail pipe of a car at 800K.
The general molecular formula for alkanes is CnH2n+2. What is the general molecular formula for cycloalkanes with two rings
To this was added 20.0 ml of DI water making to the total volume 30.0 ml. The concetration of the unknown acid was 0.868 M. What was the concentration of the original acid?
A gas has a volume of 95 ml at a pressure of 930 torr. what volume will the gas occupy if the pressure is increased to 970 torr?
what the molarity of H2SO4 if 15.85 mL of the solution is needed to neutralize 1.00g NaHCO3 molar mass 84.01 g/mol
Use the oxidation-number method to balance the following net ionic redox equation.
What is the equilibrium concentration of hydronium ion in a solution that is 0.041 M in HF and 0.19 M in F1- ion.
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