Calculate the change in thermal energy of the water in a pond with a mass of 1,000 Kg and a specific heat of 4,184 J/kg °C if the water cools by 1°C ​

4184000 J

Explanation:

that is the aNSweR

We will consider that specific heat of any material raises the temperature of 1 kg in 1°C.

Q= m ( Tf - Ti ) C,

where m is mass, Tf is final temperature, Ti is initial temperature and C is the specific heat of the substance.

So, by substituting values, the answer we get is 4184000 J

Hope it helps you...

Answered by Benjemin

  the grams     of oxygen gas   that can be produced     is 20.6   grams of o₂

calculation

2liclo₃ →   2 licl + 3 o₂

step 1:   find the moles of liclo₃

moles = mass÷ molar mass

from periodic table the molar mass of liclo₃ =6.9 +35.5   +(16 x3) =90.4 g/mol

moles=38.7 g÷90.4 g/mol=0.4281   moles

step 2:   use the   mole ratio   to calculate the moles of o2

from equation above, liclo₃: o₂   is 2: 3  

therefore the moles of   o₂=0.4281 moles x3/2 =0.6422   moles

step 3: find mass   of o₂

mass= moles x molar mass

from periodic table the   molar mass of   o₂ = 16 x2= 32 g/mol

mass=0.6422   moles   x   32 g/mol = 20.6 grams of o₂