Which statement below is FALSE about how surface currents affect climate? a
The temperature of the air above a certain region is what affects the temperature of the ocean's surface currents.
b
The temperature of the water at the surface of the ocean affects the air above it.
c
Warm water currents can heat air and produce warmer air temperatures.
d
Cold water currents can absorb heat and produce cooler air temperatures.

confused

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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