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AVprozaik [17]
3 years ago
12

An unknown solid is added to water in a calorimeter. The temperature of the water increases. What does this say about the reacti

on? A) The reaction is exothermic. B) The reaction is endothermic. C) The reaction has absorbed heat from the solution. D) The reaction has released heat to the solution. E) Both A and D are correct.
Chemistry
1 answer:
3241004551 [841]3 years ago
3 0

Answer:

E)both A and D are correct

Explanation:

an exothermic reaction releases heat to its surrounding so if the temperature of the water increased then it is an exothermic reaction

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What property characterizes a spontaneous redox reaction?
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Answer: C

Explanation:

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What is the effect of adding heat to a gas at constant pressure?
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The pressure will continue to build up eventually causing a release of pressure or an explosion.
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A hydrocarbon sample was burned in a bomb calorimeter. The temperature of the calorimeter and the 1.00 kg of water rose from 20.
fomenos

Answer:

The heat released by the combustion is 20,47 kJ

Explanation:

Bomb calorimeter is an instrument used to measure the heat of a reaction. The formula is:

Q = C×m×ΔT + Cc×ΔT

Where:

Q is the heat released

C is specific heat of water (4,186kJ/kg°C)

m is mass of water (1,00kg)

ΔT is temperature change (23,65°C - 20,45°C)

And Cc is heat capacity of the calorimeter (2,21kJ/°C)

Replacing these values the heat released by the combustion is:

<em>Q = 20,47 kJ</em>

6 0
3 years ago
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Ivanshal [37]

Answer:

The cost of driving this car is 33.33 miles per dollar.

Explanation:

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\frac{ 4 miles/kWh}{12 cents/kWh}=\frac{1 miles}{3 cents}

1 cents = 0.01$

The cost of driving this car in miles per dollars:

\frac{1}{3} miles/cent=\frac{1 miles}{3\times 0.01\$}=33.33 miles/\$

3 0
3 years ago
HOW MANY LITERS ARE IN 7110.5 mL? WHAT IS THE UNIT?
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1 year ago
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