How many calories are released when 500 g of water cools from 95.0°C to 25.0°C?
A)35.0 cal
B)70.0 cal
C)1.25 × Cal
D)3.50 × Cal
E)4.75 × Cal

Question

How many calories are released when 500 g of water cools from 95.0°C to 25.0°C?
A)35.0 cal 
B)70.0 cal 
C)1.25 × Cal 
D)3.50 × Cal 
E)4.75 × Cal

Quizplus · Accepted Answer

The formula for calculating the amount of heat released or absorbed during a temperature change for a substance is Q = mCΔT, where Q is the amount of heat released or absorbed, m is the mass of the substance, C is the specific heat capacity of the substance, and ΔT is the change in temperature.

In this case, we have:
- m = 500 g
- ΔT = (95.0 - 25.0)°C = 70.0°C
- The specific heat capacity of water is C = 1.00 cal/g°C.

Plugging in the values, we get:
Q = (500 g) x (1.00 cal/g°C) x (70.0°C) = 35,000 cal = 3.50 x 10^4 cal

Therefore, the correct answer is D, 3.50 × 10^4 Cal.

How Many Calories Are Released When 500 G of Water