The heat released in the combustion of benzoic acid, C6H5COOH, which is often used to calibrate calorimeters, is -3228 kJ/mol. When 1.658 g of benzoic acid was burned in a calorimeter, the temperature increased by 2.821 degrees Celsius. What is the heat capacity?

1 Cal= 4.18 kJ

When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 5.77 g of NaClO4(s) are dissolved in 112.90 g of water, the temperature of the solution drops from 23.94 to 22.44 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.62 J/°C. Based on the student's observation, calculate the enthalpy of dissolution of NaClO4(s) in kJ/mol. Assume the specific heat of the solution is equal to the specific heat of water. AH dissolution kJ/mol Submit Answer Retry Entire Group 3 more group attempts remaining Thermometer Cardboard or Styrofoam lid Nested Styrofoam cups Reaction occurs in solution.

An experiment is carried out where 12.2g of NaOH is dissolved in 240.0g of water in a coffee cup calorimeter. Dissolution is not a chemical reaction, but is a chemical process. NaOH(s) → Na+(aq) + OH-(aq) The mixture can be assumed to have the same specific heat capacity as liquid water  (4.18J/g.C) What is the massof the sorroundings where the temperature is being measured in this experiment?

8. A 1.107-g sample of benzoic acid (HC;H;O2) is burned in an excess of O:(g) in a bomb calorimeter, which is immersed in water. The reaction produces heat that causes the temperature of the water and bomb to increase from 24.96 to 29.20°C. (a) If the heat capacity of the calorimeter is 6.90 kJ/ºC, how many kilojoules of heat are produced by the combustion of 1.107 g of benzoic acid? (b) Calculate the heat of combustion per gram of benzoic acid and the molar enthalpy of combustion of benzoic acid.

A chemist carefully measures the amount of heat needed to raise the temperature of a 0.19 kg sample of C,H,N from -4.5 °C to 6.6 °C. The experiment shows that 6.14 × 10° J of heat are needed. What can the chemist report for the molar heat capacity of C,H,N? Round your answer to 2 significant digits. O J-mol -1 - 1 ·K х10 ?

When 1.091 grams of sucrose (Molar mass 342.3 g/mol) is burned in a bomb calorimeter, the temperature of the calorimeter increases from 22.41°C to 26.63°C. If the heat capacity of the calorimeter is 4.900 kJ/°C, what is the heat of combustion of sucrose, in kJ/mol?

Consider the compound NH4Cl, ammonium chloride, having a molar mass of 53.491 g/mol. Nicole weighs out 12.41g of NH4Cl and also 125.0 g of water for her calorimetry experiment. Nicole dissolves her ammonium chloride in the water and finds that the temperature of the water decreases from 23.7°C to 17.3°C. Assume the specific heat capacity of the water, Cs,water, is 4.184 J/(g °C) and that no energy is transferred to the calorimeter (qcal = 0 J) Find the heat (in J) transferred to the water, qwater, during the process NH4Cl (s) --> NH4Cl (aq). Use the equation qwater = mwater Cs,water ∆T.

In an experiment, 30.0 g of metal is heated to 98.0°C and then quickly transferred to 50.0 g of water in a calorimeter at 27.0°C. The heat capacity of the calorimeter with the water is 211 J/°C. The final temperature comes to 32.5°C. What is the approximate specific heat capacity of the metal? [C>(water) = 4.18 J/(g · °C)] 0.591 J/(g · °C) b. 29.5 J/(g · °C) 0.540 J/(g · °C) d. 0.140 J/(g · °C) e. 83.0 J/(g · °C) a. c.

A) When 1.911 grams of sucrose (Molar mass 342.3 g/mol) is burned in a bomb calorimeter, the temperature of the calorimeter increases from 22.410 °C to 26.630 °C. If the heat capacity of the calorimeter is 4.900 kJ/ °C, what is the heat of combustion of sucrose, in kJ/mol? And B) A 90.0 g piece of metal, initially at 98.60 °C, is placed into 120.0 g of water initially at 24.30 °C. If the final temperature of the water is 34.00 °C, what is the specific heat of the metal? (The specific heat of water is 4.184 J/g･ °C).