Acalorimeter contains 280.0g of water at 13.5c. when 0.250g of a substance with a molar mass of 510.0g/mol is dissolved, the temperature of the resultant solution increases to 17.5c. assume that the specific heat and density of the resulting solution are equal to those of water, 4.18j/gc and 1.00 g/ml, respectively and assume that no heat is lost to the calorimeter itself, nor to the surroundings. calculate the amount of heat in joules released by dissolving the substance.

The change in heat is simply equal to:

change in heat ΔH = final enthalpy – initial enthalpy

ΔH = [280.25 g * 4.18J/gC * (17.5°C)] – [280 g * 4.18J/gC * 13.5°C]

ΔH = 4,699.89 J = 4.7 kJ

Hence heat released is about 4.7 kJ

did anyone actually do this? like if anyone has submitted this i rly need .

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