How much heat is needed to raise the temperature of water with mass of 27.0 g at 20.0°C to 45.0°C?

Chemistry

1 answer:

ohaa [14]3 years ago

7 0

Answer:

2835 J

Explanation:

Take the specific heat capacity of water as 4.2 J/ g°C.

Energy (heat) = mass x specific heat capacity x change in temperature

(E= mcΔT)

E = 27 x 4.2 x (45-20)

E = 2835 J

You might be interested in

What is the mass of 0.714 moles of Mercury (I) Chloride (Hg2Cl2)?

ArbitrLikvidat [17]

Data:

m (Sample Mass) = ?
n (Number of moles) = 0.714 mol
MM (Molar Mass) of Mercury (I) Chloride ( $Hg_{2} Cl_{2}$ )
Hg = 2*200.59 = 401.18 amu
Cl = 2*35.453 = 70.906 amu
----------------------------------------
Molar Mass $Hg_{2} Cl_{2}$ = 401.18 + 70.906 = 472.086 ≈ 472.09 amu or 472.09 g/mol

Formula:

$n = \frac{m}{MM}$

Solving:

$n = \frac{m}{MM}$
$0.714 = \frac{m}{472.09}$
$m = 337.07226\:\to\:\boxed{\boxed{m\approx 337 g}} \end{array}}\qquad\quad\checkmark$

Answer:
By approximation would be letter D) 337.2 g

8 0

3 years ago

PLZ HELP!

DiKsa [7]

The impact that the oil spill has is environmental impacts.

7 0

3 years ago

How does the use of hydroelectric energy compare to the use of coal?

lora16 [44]

Hydroelectric energy uses the movement of water to spin a turbine and produce electricity. Coal is a fossil fuel that is burned as an energy source, which results in emissions such as carbon dioxide, nitrogen, and sulfur. Coal use is associated with waste products both from the mining process to acquire the coal and also from the actual use of coal itself. Hydroelectric energy does not involve waste, but does pose potential problems to waterways. Coal use is more common than the use of hydroelectric energy.

4 0

3 years ago

How many moles of sodium sulfate will be formed if you start with 3.7 moles of sodium hydroxide?

kramer

2 mol of Sodium hydroxide (NaOH) reacts to form 1 mol of sodium sulfate (Na_2SO_4)

1 mol of NaOH produces 1/2 mol sodium sulfate.

3.7moles of Na OH produces

1/2(3.7)=1.8mol sodium sulfate

6 0

2 years ago

Quien inventó la electricidad

makvit [3.9K]

Can you put this in english

6 0

3 years ago