Question

In: Chemistry

Lab9 q10 When a 4.72 g sample of solid sodium hydroxide was dissolved in a calorimeter...

Lab9 q10

When a 4.72 g sample of solid sodium hydroxide was dissolved in a calorimeter in 60.0 g of water, the temperature rose from 25.9 oC to 47.0 oC . Calculate ΔH (in kJ/mol NaOH) for the following solution process:

NaOH(s)→Na+(aq)+OH−(aq)

Assume that it’s a perfect calorimeter and that the specific heat of the solution is the same as that of pure water.


(-------------)  kJ/mol

Solutions

Expert Solution


Related Solutions

When 2.50 g of sodium hydroxide (NaOH) was dissolved in 100.00 g of water a value...
When 2.50 g of sodium hydroxide (NaOH) was dissolved in 100.00 g of water a value of 12.00oC was obtained for ΔT. Calculate the molarity of the sodium hydroxide solution. Calculate the value (calories) for the heat of solution of 2.50 g of NaOH Calculate the number of calories that would be produced if one mole of sodium hydroxide was dissolved. (ΔHsolnNaOH)
When a 7.00-g sample of RbBr is dissolved in water in a calorimeter that has a...
When a 7.00-g sample of RbBr is dissolved in water in a calorimeter that has a total heat capacity of 1.931 kJ·K–1, the temperature decreases by 0.480 K. Calculate the molar heat of solution of RbBr.
When a 7.00-g sample of RbBr is dissolved in water in a calorimeter that has a...
When a 7.00-g sample of RbBr is dissolved in water in a calorimeter that has a total heat capacity of 3.090 kJ·K–1, the temperature decreases by 0.300 K. Calculate the molar heat of solution of RbBr.
sodium hydroxide dissolved
A student added 10 g (0.25 mol) of sodium hydroxide to 40 cm3 of water to make a concentrated solution. All the sodium hydroxide dissolved. He measured the maximum temperature rise. He suggested that these results would give an accurate value for the standard enthalpy change of solution. Give two reasons why he is incorrect. 
An unknown mass of sodium hydroxide is dissolved in 500 g of water. This solution is...
An unknown mass of sodium hydroxide is dissolved in 500 g of water. This solution is neutralized by adding successively 18 g of CH3COOH, 25.2 g HNO3, and 29.4 g of H2SO4. Determine a) the mass of NaOH b) the mass of H2O in the neutral solution.
What is the pH of the solution when 10.005g of sodium hydroxide is dissolved in 500mL...
What is the pH of the solution when 10.005g of sodium hydroxide is dissolved in 500mL of 0.5M acetic acid. pKa value for acetic acid is 4.74.
When 6M sodium hydroxide is added to an unknown white solid, the solid dissolves. What is...
When 6M sodium hydroxide is added to an unknown white solid, the solid dissolves. What is a possible identity for this solid? The options include: Mg(OH)2, Al2(SO4)3, BaCO3, and AgBr. Which one would the solid be and why?
A 4.75 g sample of solid NaOH is dissolved in 50.5 g of H2O in a...
A 4.75 g sample of solid NaOH is dissolved in 50.5 g of H2O in a constant-pressure calorimeter having a heat capacity of 18.5 J/°C. The temperature rises from 21.1°C to 33.6°C. Assuming that the solution has a specific heat capacity of 4.184 J/g·°C and negligible heat loss from the calorimeter, how much heat is produced in the solution process? Thanks so much!!
When 0.500 g solid sodium reacts with chlorine gas, a solid with a mass of 1.27 g is formed (sodium chloride).
When 0.500 g solid sodium reacts with chlorine gas, a solid with a mass of 1.27 g is formed (sodium chloride). Based upon this information, what is the empirical formula of sodium chloride? Show your calculations.
When 28 g of calcium chloride was dissolved in 100g water in a coffee-cup calorimeter, the...
When 28 g of calcium chloride was dissolved in 100g water in a coffee-cup calorimeter, the temperature rose from 25* Celcius to 41.3. What is the enthalpy change for this process? Assume the solution is equal to the specific heat of water.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT