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2 years ago

13

If a beaker of water and a beaker of acetic acid are at the same elevated temperature, which will cool more quickly to room temp

erature? Support your answer.

1 answer:

WINSTONCH [101]2 years ago

3 0

Beaker of water i guess because usually at home when i get out cold water i put in my room and it cools fast for me so..... i think

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Which characteristics from the list below cause terrestrial planets to be more likely to have life than Jovian planets?

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1 year ago

1. An electric power plant uses energy from burning coal to generate steam at 450 °C. The plant is cooled by 20 °C water

kap26 [50]

Answer:

Explanation:

Efficiency of the electric power plant is $e=1-\frac{T_{2}}{T_{1}}$

Here Temperature of hot source $T_{1} = 450^{o}C=450+273=723 K$

and Temperature of sink $T_{1} = 20^{o}C=20+273=293 K$

Hence the efficiency is $e=1-\frac{293}{723}=0.5947=59.47%$

Now another formula for thermal efficiency Is

$e_{therm}=\frac{Q_{1}-Q_{2}}{Q_{1}}=\frac{W}{Q_{1}}$

Here QI is the of heat taken from source 100 MJ ; Q2 of heat transferred to the sink (river) to be found

W is the of work done and W = QI -Q2

Hence From $e_{therm}=\frac{Q_{1}-Q_{2}}{Q_{1}}=\frac{W}{Q_{1}}$

$W=e(Q_{1})=(0.5947)(100)=59.47MJ$

Hence the of heat transferred to the river Is $Q_{2} -W = (100 -59.47=40.53$

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2 years ago

Which sample of water contains particles having the highest average kinetic energy ?

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25mL if water as the highest average of the kinetic energy

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2 years ago