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algol [13]
3 years ago
6

A system gains 652 kJ of heat, resulting in a change in internal energy of the system equal to +241 kJ. How much work is done?

Chemistry
1 answer:
levacccp [35]3 years ago
3 0

Answer:

-411 kj

Explanation:

We solve by using this formula

∆U = ∆Q + ∆W

This formula is the first law of thermodynamics

Change in internal energy U = +241

Heat gained by system Q = 652

Putting the value into the equation

+241 = 652 + W

Workdone = 241 - 652

Workdone = -411 kj

Since work done is negative it means that work was done by the system

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2 years ago
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Answer:

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3 years ago
When collecting a gas over water, the gas is always a mixture of the gas collected and water vapor. question 5 options:
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6 0
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Write the formula of the conjugate base of the Brønsted-Lowry acic, HF​
alexdok [17]

Answer:

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Explanation:

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5 0
3 years ago
Which sample of HCl reacts at the fastest rate with a 1.0 - gram sample of iron filling
allsm [11]

Question:

The options are;

a. 10. mL of 1 M HCl(aq) at 10.oC

b. 10. mL of 1 M HCl(aq) at 25oC

c. 10. mL of 3 M HCl(aq) at 10.oC

d. 10. mL of 3 M HCl(aq) at 25oC

Answer:

The correct option is;

d. 10 mL of 3 M HCl(aq) at 25 °C

Explanation:

Factors that influence the rate of the reaction include;

Concentration and

Temperature

Concentration

An increase in concentration leads to a increased number of interaction among the the reacting components of HCl and iron filings such that the number of effective interaction or the rate of the reaction increases, therefore, a 10 mL 3 M HCl will react faster than a 10 mL  of 1 M HCl.

Temperature

When the temperature of the reacting HCl is increased, the energy within the reacting system increases leading to an increase in the number of high energy collisions which results in an increased reaction rate, therefore, HCl at 25 °C will react faster than HCl at 10 °C.

Hence the correct option is 10 mL of 3 M HCl(aq) at 25 °C.

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3 years ago
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