A student dissolved 5.05 g of KNO3 in 100.302 g of water. The temperature changed from...

A student dissolved 5.05 g of KNO3 in 100.302 g of water. The temperature changed from 25 to 21.7°C. Calculate the enthalpy of solution the student experimentally found in kJ/mole of KNO3. Is this an endothermic or an exothermic
reaction?

Expert Solution

queen_honey_blossom answered 7 months ago

A student dissolved 10.5 g of NH4Cl in 40 mL of water. The temperature of the water...

A student dissolved 10.5 g of NH4Cl in 40 mL of water. The temperature of the water changed from 22.5oC to 5.1oC. Calculate the enthalpy of hydration of ammonium chloride in J/mol. 1. A student collected the data below while performing a kinetics experiment. Trial Volume of 2.0 M Reactant A Volume of 0.5 M Reactant B Volume of H2O Time for B to react 1 10 mL 10 mL 30 mL 135 sec 2 20 mL 10 mL 20 mL 69 sec...

Part A A KNO3 solution containing 45 g of KNO3 per 100.0 g of water is...

Part A A KNO3 solution containing 45 g of KNO3 per 100.0 g of water is cooled from 40 ∘C to 0 ∘C. What will happen during cooling? Match the words in the left column to the appropriate blanks in the sentences on the right. Help Reset 58 63 45 10 14 31 35 85 At 40 ∘C the solution has ... g of KNO3 per 100 g of water and it can contain up to ... g of KNO3...

When KNO3 is dissolved in water, the resulting solution is significantly colder than the water was...

When KNO3 is dissolved in water, the resulting solution is significantly colder than the water was originally. (a) What conclusions can you draw about the intermolecular attractions involved in the process? (b) Is the resulting solution an ideal solution?

If 17.5 g of NaCl is dissolved in 100. g of water, what is the mass...

If 17.5 g of NaCl is dissolved in 100. g of water, what is the mass % concentration of NaCl in this solution? Note: 1. Use 3 sig figs for your final answer. 2. Do not answer as fractions. For example, if you think 30% is the correct answer, either "30" or "30%" will be accepted, but "0.30" will not. "30%" will actually be converted to 30 automatically

A student mixes 93.7 g of water at 71.3 C with 43.7 g of water at...

A student mixes 93.7 g of water at 71.3 C with 43.7 g of water at 18.3 C in an insulated flask. What is the final temperature of the combined water?

400 g of MgCl2 is dissolved in 1000 g of water. What is the freezing point...

400 g of MgCl2 is dissolved in 1000 g of water. What is the freezing point of this solution? Kf.p.= 1.86 degrees C/m for water

- A 35.0 g sample of ethylene glycol, HOCH2CH2OH is dissolved in 500 g of water....

- A 35.0 g sample of ethylene glycol, HOCH2CH2OH is dissolved in 500 g of water. The vapor pressure of water at 32 C is 35.7 mmHg, What is the vapor pressure of the water/ethylene glycol solution at 32 C? - What is the Boiling Point of the solution resulted from the dissolving of 32.5 g of sugar (C6H12O6) in 250.0 g of water? - . A 1.07 mg sample of a compound was dissolved in 78.1 mg of camphor....

If the temperature drops when a salt is dissolved in water. Its heat of solution is...

If the temperature drops when a salt is dissolved in water. Its heat of solution is Select one: a. exothermic b. positive c. cold d. negative

14.00 g of anhydrous sodium acetate (82.03 g/mol) was dissolved in 100.00 g of water, the...

14.00 g of anhydrous sodium acetate (82.03 g/mol) was dissolved in 100.00 g of water, the heat capacity of the reaction mixture was 4.045 J/g K. The change in temperature was increased by 6.40 °C. 1. is this an exothermic or a.m. endothermic reaction? 2. the heat transferred (qsys), was? 3. the number of moles of anhydrous sodium acetate dissolved is? 4. the (delta H) of dissolution for anhydrous sodium acetate is?

A 0.9140 g sample of a mixture of NaCl and KCl is dissolved in water, and...

A 0.9140 g sample of a mixture of NaCl and KCl is dissolved in water, and the solution is then treated with an excess of AgNO3 to yield 1.943 g of AgCl. Calculate the percent by mass of each compound in the mixture.

Question