A student heats 84.17 mL of water to 95.27°C using a hot plate. The heated water is added to a calorimeter containing 73.92 mL of cold water. The water temperature in the calorimeter rises from J and the density of water is g• °C 2.15°C to 39.78°C. The specific heat capacity of water is 4.184 1.00 mL Assuming that heat was transferred from the hot water to the cold water and the calorimeter, determine the heat capacity of the calorimeter. J Heat capacity of calorimeter = °C

A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 4.70 kg of water at 38.7 °C. During the reaction 55.6 kJ of heat flows out of the flask and into the bath. Calculate the new temperature of the water bath. You can assume the specific heat capacity of water under these conditions is -1 4.18 J∙g¯¹·K¯¹. Be sure your answer has the correct number of significant digits. 心。 °℃ x10 S

A piece of chromium metal with a mass of 24.50 g is heated in boiling water to 98.3 °C and then dropped into a coffee-cup calorimeter containing 82.3 g of water at 23.4 °C. When thermal equilibrium is reached, the final temperature is 25.7 °C. Calculate the specific heat capacity of chromium. (The specific heat capacity of liquid water is 4.184 J/g ⋅ K.)

when 50.0 mL of 0.200 M NaOH is mixed with 50 mL of 0.200 M HCl in a coffee cup calorimeter, the temperature increases from 23.5 degrees C to 26.5 degrees C. Assuming that the density of the resulting solution is 1.00 g/mL and the specific heat capacity of the solution is 4.18 J/g degrees C, what is qrxn?

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 3.95 g of CuCl2(s) are dissolved in 108.60 g of water, the temperature of the solution increases from 23.05 to 26.27 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.86 J/°C. Based on the student's observation, calculate the enthalpy of dissolution of CuCl,(s) in kJ/mol. Assume the specific heat of the solution is equal to the specific heat of water. AHdissolution kJ/mol

A chemist carefully measures the amount of heat needed to raise the temperature of a 0.46 kg sample of a pure substance from 36.2 °C to 51.6 °C. The experiment shows that 33. kJ of heat are needed. What can the chemist report for the specific heat capacity of the substance? Round your answer to 2 significant digits.

When an 28.6 g sample of an unknown metal at 142.2 °C is placed into 99.4 g of water at 21.7 °C the final temperature is 31.2 °C. What is the specific heat capacity of the metal in J/g°C

A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 5.30 kg of water at 26.9 °C. During the reaction 78.1 kJ of heat flows out of the flask and into the bath. -1 -1 Round your Calculate the new temperature of the water bath. You can assume the specific heat capacity of water under these conditions is 4.18 J∙g ¹·K answer to 3 significant digits. 1°C x10 X Ś ?

A chemist carefully measures the amount of heat needed to raise the temperature of a 639.0 g sample of C,H,N from -8.7 °C to 6.7 °C. The experiment shows that 2.60 × 10* J of heat are needed. What can the chemist report for the molar heat capacity of C,H,N? Round your answer to 3 significant digits. - 1 ·K J• mol х10