The addition of 3.72 g of ba(oh)2 · 8 h2o to a solution of 1.26 g of nh4scn in 133 g of water in a calorimeter caused the temperature to fall by 4.3°c. assuming the specific heat of the solution and products is 4.20 j/g·°c, calculate the approximate amount of heat (in j) absorbed by the reaction, which can be represented by the following equation. ba(oh)2 · 8 h2o(s) + 2 nh4scn(aq) → ba(scn)2(aq) + 2 nh3(aq) + 10 h2o(l)

The amount of heat absorbed by the reaction is 2491.92 J

Explanation:

Step 1: The balanced equation

Ba(OH)2 · 8 H2O(s) + 2 NH4SCN(aq) → Ba(SCN)2(aq) + 2 NH3(aq) + 10 H2O(l)

Step 2: Data given

mass of Ba(OH)2 · 8 H2O(s)  = 3.72g

Molar mass of Ba(OH)2 · 8 H2O(s)  = 315.46 g/mol

mass of NH4SCN = 1.26 g

Molar mass of NH4SCN = 76.122 g/mol

mass of water = 133g

Molar mass of water = 18.02 g/mol

Temperature decreases with 4.3 °C this is an endothermic reaction

specific heat of the solution and products is 4.20 J/g·°C

Step 3: Calculate heat transfer

Q = m*c*ΔT

with m = the mass = mass of Ba(OH)2 · 8 H2O + mass of NH4SCN + mass of water = 3.72 + 1.26 + 133 = 137.98

with c = the specific heat capacity of the solution = 4.20 J/g°C

with ΔT = The change in temperature = 4.3 °C

Q = 137.98 * 4.20 * 4.3 = 2491.92 J

The amount of heat absorbed by the reaction is 2491.92 J

idk

explanation:

the tides are influenced by both the moon and the sun, it's easy to see that when the sun lines up with the moon and the earth, as during a new moon or full moon, the tidal effect is increased. these are known as spring tides, named not for the season, but for the fact that the water "springs" higher than normal. on the other hand, if the sun and the moon are 90 degrees apart in relation to an observer on earth as during the first quarter moon or third quarter moon, then high tides are not as high as they normally would be. this is because despite its greater distance, the sun's mass allows it to exert enough gravitational force on the oceans that it can negate some of the effects of the moon's pull. this phenomenon of lower high tides is called a neap tide. if you need more information on this topic visit moonconnection.com.