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xxMikexx [17]
3 years ago
15

Question:

Chemistry
1 answer:
anzhelika [568]3 years ago
7 0

Answer:

A. Chemical

B. physical

Explanation:

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Cual es el calor específico de una sustancia que tiene una masa de 15 g y una capacidad térmica de 0.550 calC
mr Goodwill [35]

Answer:

Explanation:

Q = Ce . m .ΔT

Q : calor  

Ce : calor especifico

m: masa  

ΔT : variación de temperatura

capacidad térmica : 0,550 cal / °C

lectura :

por 1 °C se tiene 0,550 cal

por lo tanto  tenemos datos de la temperatura y del calor

pero no olvidar las unidades en el sistema internacional :

Ce : J / kg . K

J: joules

kg: kilogramo

K: kelvin  

pasar de gramos a kilogramos

pasar de calorías a joules

pasar de grado celsius a kelvin

1000g equivale a 1kg

15g     equivale a 0,015 kg

K= °C + 273 ⇒ formula para pasar de grado celsius a kelvin

K=  1 + 273

K= 274

1 caloría equivale a  4,184 joules

0,550 caloría  equivale a 2,3012 joules

ahora como todos los datos ya están en el S.I remplazamos en la formula

Q = Ce . m .ΔT

2,3012 = Ce . 0,015.274

Ce=0,5599 J / kg. K

6 0
3 years ago
Calculate the amount of heat required to raise the temperature of a 65-g sample of water from 32 ∘C to 65 ∘C. (The specific heat
dsp73

The amount of heat required is 9.0 kJ.

<em>q = mC</em>Δ<em>T </em>

Δ<em>T</em> = <em>T</em>_f – <em>T</em>_i = 65 °C – 32 °C = 33 °C

<em>q</em> = 65 g × 4.184 J·°C⁻¹g⁻¹ × 33 °C = 9000 J = 9.0 kJ

8 0
3 years ago
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Complete the paragraph about the formation of sodium phosphide.
Nadya [2.5K]
<h2>Let us complete it :</h2>

Explanation:

let us study about formation of sodium phosphide

Electrons are transferred from atoms of  sodium to atoms of phosphorous

The sodium atom looses electrons and the phosphorus atoms  

gains electrons .

C. This transfer makes the sodium atoms  acquire positive charge and phosphorous acquire negative charge .

As a result, the sodium and phosphorus atoms strongly  bond with

each other.

8 0
3 years ago
Which of the following do plants gain from sunlight?
solmaris [256]

They gain energy , it also allows plants to create organic molecules that they use as fuel.

4 0
3 years ago
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Which of the following indicates that a chemical reaction system has reached equilibrium?
navik [9.2K]
D) if stuff is changing then the reaction is hardly in equilibrium is it? Everything is just chilling at equilibrium so there would be constant concentration
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