MCQ
A student mixes 30.0 mL of an NaOH solution originally at a temperature of 25.0 degrees Celsius with 30.0 mL of HCl at the same temperature in a coffee cup calorimeter with a heat capacity of 50.0 J/C. The final temperature of the mixture is 27.0 C. Which of the following equations calculates the heat of the calorimeter?
a) 50.0 J/C x 2 C
b) 30.0 g x 50.0J/C x 2 C
c) 60.0 g x 4.18 J/gC x 2 C
d) 30.0 g x 4.18 J/gC x 2 C
MCQ A student mixes 30.0 mL of an NaOH solution originally at a temperature of 25.0...
A student mixes 75.0 mL of water with 0.750 mol HCl at 25.0°C with 75.0 mL of water with 0.750 mol NaOH at 25.0°C in a foam cup calorimeter. The temperature of the resulting solution increases to 35°C. How much heat, in kJ, was released by the reaction. The specific heat of water is 4.18 J/g*°C. (Since the HCL and NaOH solutions are very dilute, you can assume that these solutions have the same specific heat as water. Recall, for...
When a student mixes 50 of M HCI and 50 mL of 1.0 M NaoH in a coffee-cup calorimeter, the temperature of the resultant solution increases from 21.0 degree C to 27.5 degree C. Calculate the enthal change (delta H) for the reaction in kJ/mol HCl. (Assuming that the calorimeter loses only a negligible quantity heat, that the total volume of the solution is 100 ml, that its density is 1.0 g/mL, and that its specific heat is 4.18 J/g...
When 25.0 mL of 0.700 mol/L NaOH was mixed in a calorimeter with 25.0 mL of 0.700 mol/L HCl, both initially at 20.0 °C, the temperature increased to 22.1 °C. The heat capacity of the calorimeter is 279 J/°C. Since the solutions are mostly water, the solutions are assumed to have a density of 1.0 g/mL and a specific heat of 4.18 J/g°C. What is the mass of the solution? Select one: a. No enough information b. 50.0 g c. 50.0 kg d. 25.0...
In a coffee cup calorimeter, 50.0 mL of 1.5 M NaOH and 60.0 mL of 1.4 M HCl are mixed at 25.0oC. After the reaction, the temperature is 34.1 oC. Assuming all solutions have a density of 1.00 g/cm3 and a specific heat capacity of 4.18 J/oC g, what is the enthalpy change (kJ) for the reaction?
In a coffee-cup calorimeter, 100 mL of 1.0 M NaOH and 100.0 mL of 1.0 M HCl are mixed. Both solutions were originally at 24.6 ⁰C. After the reaction, the temperature is 31.3 ⁰C. Assuming all solutions have a density of 1.0 g/mL and a heat capacity of 4.18 J/⁰C∙g, what is the enthalpy change for the neutralization of HCl by NaOH? Assume that no heat is lost to the surroundings or the calorimeter. Enter your answer in J. I...
When 25.0 mL of 0.700 mol/L NaOH was mixed in a calorimeter with 25.0 mL of 0.700 mol/L HCl, both initially at 20.0 °C, the temperature increased to 22.1 °C. The heat capacity of the calorimeter is 279 J/°C. What is the enthalpy of neutralization in kJ/ mole of HCl? Since the solutions are mostly water, the solutions are assumed to have a density of 1.0 g/mL and a specific heat of 4.18 J/g°C. Select one: a. −1020 b. -58.6 c. −5856 d. 58.6
A common laboratory reaction is the neutralization of an acid with a base. When 49.6 mL of 0.500 M HCl at 25.0°C is added to 52.0 mL of 0.500 M NaOH at 25.0°C in a coffee cup calorimeter (with a negligible heat capacity), the temperature of the mixture rises to 28.2°C. What is the heat of reaction per mole of NaCl (in kJ/mol)? Assume the mixture has a specific heat capacity of 4.18 J/(g·K) and that the densities of the...
PART A: A student constructs a coffee cup calorimeter and places 50.0 mL of water into it. After a brief period of stabilization, the temperature of the water in calorimeter is determined to be 19.6 °C. To this is added 50.0 mL of water that was originally a temperature of 54.5 °C. A careful plot of the recorded temperature established T0 as 31.1 °C. What is the calorimeter constant (J/°C)? DensityH2O = 1.00 g/mL Specific HeatH2O = 4.184 J/g·°C PART...
A common laboratory reaction is the neutralization of an acid with a base. When 41.2 mL of 0.500 M HCl at 25.0°C is added to 53.7 mL of 0.500 M NaOH at 25.0°C in a coffee cup calorimeter (with a negligible heat capacity), the temperature of the mixture rises to 28.2°C. What is the heat of reaction per mole of NaCl (in kJ/mol)? Assume the mixture has a specific heat capacity of 4.18 J/(g·K) and that the densities of the...
3. A student constructs a coffee cup calorimeter and places 50.0 mL of water into it. After a brief period of stabilization, the temperature of the water in the calorimeter is determined to be 22.1 "C. To this is added 50.0 mL of water that was originally at a temperature of 54.5 C. A careful plot of the temperatures recorded after this established the temperature at T, was 31.86 °C. What is the calorimeter constant in J/C for this calorimeter?...