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gregori [183]
2 years ago
14

How much energy is absorbed by 250.0 g of water when its temperature rises

Mathematics
1 answer:
kari74 [83]2 years ago
7 0

Answer:

.

(4.18 J/g°C) x (100.0 mL x 1.000 g/mL) x (37 - 4.0)°C = 13794 J = 13 kJ

2.  

(455 J) / (25.0 g) / (155 - 25)°C = 0.140 J/g°C

3.  

(4.184 J/g°C) x (20.0 g) x (303.0 - 283.0)°C = 1674 J

5.  

(0.129 J/g °C) x (85.0 g) x (200.0 - 10.0)°C = 2083 J

Step-by-step explanation:

I think this is the right answer, I am very, very sorry if I'm wrong

Have a Great Day or Night! :)

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\left(-\dfrac{49}{343}-\dfrac{1}{343}\right)\cdot7^{x-2}=-\dfrac{14}{25}\cdot5^{x-2}\\\\-\dfrac{50}{343}\cdot7^{x-2}=-\dfrac{14}{25}\cdot5^{x-2}\qquad\text{multiply both sides by}\ \left(-\dfrac{25}{14}\right)\\\\\dfrac{50\cdot25}{343\cdot14}\cdot7^{x-2}=5^{x-2}\qquad\text{divide both sides by}\ 7^{x-2}\\\\\dfrac{25\cdot25}{343\cdot7}=\dfrac{5^{x-2}}{7^{x-2}}\qquad\text{use}\ \left(\dfrac{a}{b}\right)^n=\dfrac{a^n}{b^n}

\dfrac{5^2\cdot5^2}{7^3\cdot7}=\left(\dfrac{5}{7}\right)^{x-2}\qquad\text{use}\ a^n\cdot a^m=a^{n+m}\\\\\dfrac{5^4}{7^4}=\left(\dfrac{5}{7}\right)^{x-2}\\\\\left(\dfrac{5}{7}\right)^4=\left(\dfrac{5}{7}\right)^{x-2}\iff x-2=4\qquad\text{add 2 to both sides}\\\\\boxed{x=6}

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