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A 100. mL sample of 0.200 M aqueous hydrochloric acid is added to 100. mL of 0.200 M aqueous ammonia in a calorimeter whose heat capacity (excluding any water) is 480. J/K. The following reaction occurs when the two solutions are mixed.
HCl(aq) + NH3(aq) ? NH4Cl(aq)
The temperature increase is 2.34°C. Calculate ?H per mole of HCl and NH3 reacted.
A. 485 kJ/mol
B. -1.96 kJ/mol
C. 154 kJ/mol
D. 1.96 kJ/mol
E. -154 kJ/mol
Ethanol (C2H5OH) melts at -114 °C. The enthalpy of fusion is 5.02 kJ/mol. The specific heats of solid and liquid ethanol are 0.97 J/g-K and 2.3 J/g-K, respectively.
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a. A 0.1044 gram sample of an unknown monoprotic acid required 22.10 mL of 0.0500 M NaOH to reach the end point. What is the molar mass of the unknown?
We place 1.32 mol PCl5 in a 1.0 L flask and allow it to reach equilibrium at a given temperature. What is the final concentration of Cl2 in the flask?
How many kJ of heat are needed to raise the temperature of 2kg of water from 29 degrees C
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