Answer to Question #318356 in General Chemistry for Kianna

Question

1) A 149.3-g sample of a metal at 75.9°C is added to 149.3 g  H2O at 14.9°C. The temperature of the water rises to 18.4°C. Calculate the specific heat capacity of the metal, assuming that all the heat lost by the metal is gained by the water. The specific heat capacity of water is 4.18 J/°C·g.

Specific heat capacity = ________J/°C·g

2) In a coffee-cup calorimeter, 110.0 mL of 1.4 M NaOH and 110.0 mL of 1.4 M  HCl are mixed. Both solutions were originally at 21.7°C. After the reaction, the final temperature is 31.1°C. Assuming that all the solutions have a density of 1.0 g/cm^3 and a specific heat capacity of 4.18 J/°C·g, calculate the enthalpy change for the neutralization of HCl by NaOH. Assume that no heat is lost to the surroundings or to the calorimeter.

ΔH = _________kJ/mol

Answer 1

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