Question 54 1 pts What happens to a given mass of water as it is cooled...

Question 54 1 pts What happens to a given mass of water as it is cooled from 4°C to zero? it contracts it expands it vaporizes none of the above Flag this Question Question 55 1 pts A gasoline engine operates between a high temperature TH = 127oC a low temperature TC = 27o C. If this engine operates with Carnot efficiency, its efficiency is closest to 10% 25% 33% 79%

Solutions

Expert Solution

(54)

Density of water is maximum at 4 C, when it is cooled to zero, its volume increases i.e it expands.

(55)

Cold temperature, TC = 27C = 273.15 +27

= 300.15 K

Hot temperature, TH = 127C = 273.15+127

= 400.15 K

We know that,

Carnot efficiency, = {1 - (TC/TH)}*100

= {1 - (300.15/400.15)}*100

= {1 - 0.75}*100 = 0.25*100

= 25%

genius_generous answered 2 months ago

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