When 40.0 mL of 1.00 M H2SO4 is added to 80.0 mL of 1.00 M NaOH at 20.00°C in a coffee cup calorimeter, the temperature of the aqueous solution increases to 29.20°C. If the mass of the solution is 120.0 g and the specific heat of the calorimeter and solution is 4.184 J/g • °C, how much heat is given off in the reaction?
Use q equals m C subscript p Delta T..

A). 4.62 kJ
B). 10.0 kJ
C). 14.7 kJ
D). 38.5 kJ

4.62 kJ of heat is given off in the reaction.

Explanation:

Let's assume specific heat of calorimeter is negligible.

So, amount of heat given off, q = heat absorbed by solution

                                                    = ()

where, m is mass, C is specific heat and is change in temperature.

So, q =

         = 4619 J

         = 4.62 kJ (3 sig. fig.)

Option (A) is correct

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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