Select all the correct answers. A pot of water is heated over a fire, and then frozen peas are added to the hot water. What happens to the energy in this situation?
The energy gained by the peas is lost by the water.

The peas lose energy as they are heated in the water.
Energy is transferred from the peas to the water and the pot.
The water receives energy both from the fire and from the frozen peas.
Energy is transferred from the fire to the pot, then to the water, and then to the peas.

43.452

step-by-step explanation:

284 times .153 = 43.452

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol