2.99 °C is the change in temperature if a 40 g sample of water absorbs 500 calories of energy.
<h3>What is specific heat capacity?</h3>
The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).
Given data:
m = 40 g
Q = 500 J
Specific heat capacity of water = 4.18 J/g°C
Change in Temperature =?
The formula for Heat Energy is given by:
Q = mcp∆T
where: Q - Heat Energy
m - mass
cp - specific heat
∆T = change in temperature, 
Solution:
Substituting the value of m, specific heat capacity of water and Q in the formula,
500 J = (40 g)(4.18 J/g°C)(∆T)
∆T = 2.99 °C
Learn more about the specific heat capacity here:
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Answer:
It is negative
Explanation:
11 negative charges is more than 9 positive charges, so the higher number takes over the lower one making the entire substance negative.
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Answer:
Amount of energy released = 
Explanation:
For 
:-
Mass of = 4.465 kg = 4465 g ( 1 kg = 1000 g)
Molar mass of = 27.66 g/mol
The formula for the calculation of moles is shown below:
Thus,
From the reaction,
1 mole of releases 755.4 kJ of energy
161.42 moles of releases 755.4*161.42 kJ of energy
Amount of energy released =
Answer:
stars are born in vast clouds of gas and dust. stars spend most of their lives on the main sequence fusing hydrogen gas to helium gas. stars eventually swell up to form a red giant star. stars like the Sun end their lives as planetary nebulae and white dwarfs.
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