Aurelie is doing a lab in her chemistry class. Her teacher defined a calorie as the amount of energy needed to raise the temperature of one gram of water one degree Celsius. Aurelie has measured 300 grams of water into a beaker and

recorded its initial temperature as 20°C

How many calories does Aurelie need to increase the temperature of the water to 25° Celsius? Give your answer in calories and

Calories.

A. 1.500 Calories or 1.50 calories

B. 1.500 Calories or 150.0 calories

C. 1,500 calories or 15.0 Calories

D. 1.500 calories or 1.50 Calories

Question

Penelope Smith

Chemistry

4 March, 11:00

Aurelie is doing a lab in her chemistry class. Her teacher defined a calorie as the amount of energy needed to raise the temperature of one gram of water one degree Celsius. Aurelie has measured 300 grams of water into a beaker and

recorded its initial temperature as 20°C

How many calories does Aurelie need to increase the temperature of the water to 25° Celsius? Give your answer in calories and

Calories.

A. 1.500 Calories or 1.50 calories

B. 1.500 Calories or 150.0 calories

C. 1,500 calories or 15.0 Calories

D. 1.500 calories or 1.50 Calories

+2

Answers (1)

Know the Answer?

Gustavo Day · Answer 1

1.50 cal

Explanation:

Given dа ta:

Mass of water = 300 g

Initial temperature = 20 °C

Final temperature = 25 °C

Calories needed = ?

Formula:

Q = m. c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Solution:

ΔT = T2 - T1

ΔT = 25 °C - 20°C

ΔT =

Q = m. c. ΔT

Q = 300 g. 4.18j/g. °C. 5°C

Q = 6270 J

J calories:

6270 / 4184 = 1.50 cal