How much heat was transferred and in which direction
If the internal energy of a thermodynamic system is increased by 300. J while 75 J of expansion work is done, how much heat was transferred and in which direction, to or from the system?
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A solution has 41.7% transmittance in a cell with a pathlength of 1.00 cm. If the material responsible for the absorptionof light has a molar absorptivity = 738(L/mole- cm) at thewavelength used, calculate the concentration of this solution inmol
Hydrogen iodide, HI decomposes in the gas phase to produce Hydrogen, H2, and iodine, I2. Measuring the value of the rate constant, k.
Make a rough plot of pH versus milliliters of acid added for the titration of 50.0 mL of 1.0 M NaOH with 1.0 M HCl. Indicate the pH at the following points, and tell how many milliliters of acids are required to reach the equivalence point.
The reaction A + 2B products was found to have the rate law, rate = k[A][B]2. Predict by what factor the rate of reaction will increase when the concentration of A is doubled and the concentration of B is also doubled.
Calculate the volumes of air and hydrogen gas at 14°C and 1.00 atm that are necessary to produce 1.00 multiplied by 103 kg of pure molybdenum from MoS2. Assume air contains 21% oxygen by volume and assume 100% yield for each reaction.
A chemical reaction is found to have an activation energy (Ea = 15 kJ/mol). At a temperature of 505 K, what fraction of collisions have enough energy to exceed the activation energy?
A 10M solution. 20 g of solute was dissolved in 100 mL of water.What is the molecular weight of the solute used in the substance?
Solid lithium metal reacts with water,giving a solution of lithium hydroxide andreleasing hydrogen gas. Write a balanced equation for the reactionusing complete formulas for the compounds with phase labels.
Suppose you have a buffer at pH 5.0 that is 1.00M in HX and 1.00 M in X-, where HX is a weak acid with Ka = 1.0 x 10^(-5) M. Calculate the effects of adding 50ml of 1.0 M HCl to a 1 liter portion of this buffer and of adding 50 ml of 1.0 M NaOH to
Calculate change in Gibbs free energy for the reaction CO(g) +1/2O2(g)-CO2(g) at 298.15 K. Calculate Change in Gibbs free energy reaction at 650 K assuming that enthalpy change in reaction is constant in the temperature interval of interest.
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