In a coffee cup calorimeter, 1.60 g of NH4NO3 is mixed with 75.0 g of water at an initial temperature of 25.008C. After dissolution of the salt, the final temperature of the calorimeter contents is 23.348C. Assuming the solution has a heat capacity of 4.18 J 8C21 g21 and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.

ΔH for the dissolution of is +26.0205 kJ/mol

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q = Heat released by solution  = ?

C = heat capacity =

Initial temperature of water  = =

Final temperature of water  =  =

Change in temperature ,

Putting in the values, we get:

As heat released by water is equal to heat absorbed by dissolution of  

Enthalpy change for 0.02 moles of = 520.41 J

Enthalpy change for  1 mole of =

ΔH for the dissolution of is +26.0205 kJ/mol

away from the curb

explanation:

the wheels would then hit the curb if it started to rolling, decreasing the chance of an accident.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them