Question

lesson 31b - specific heat capacity
determine the change in temperature. use appropriate significant figures.

1. you heat up 25 g of water from 85°f to 150°f. what is the change in temperature?
2. you cool 25 g of water from 75°f to -10°f. what is the change in temperature?
3. you heat up 25 g of water from 63.0°f to 180°f. what is the change in temperature?
4. you cool 25 g of water from 72°f to -25°f. what is the change in temperature?

Explanation:

Step1: Calculate ΔT for Q1

ΔT = Final T - Initial T = 150°F - 85°F = 65°F

Step2: Calculate ΔT for Q2

ΔT = Final T - Initial T = -10°F - 75°F = -85°F

Step3: Calculate ΔT for Q3

ΔT = Final T - Initial T = 180°F - 63.0°F = 117°F (3 sig figs)

Step4: Calculate ΔT for Q4

ΔT = Final T - Initial T = -25°F - 72°F = -97°F

Answer:

65°F
-85°F
117°F
-97°F