How much will the temperature of a 250 g block of silver increase if 2000 cal of heat is added to it?

143.37 K or °C

We are given;

We are required to determine change in temperature for the block of ice.

Q = m × c × ΔT, where M is the mass of an object, c is the specific heat capacity and ΔT is the change in temperature.

In this case;

Q = 2000 calories

Mass = 250 g

specific heat , c of silver is 0.0558 cal/g°C

Therefore;

Rearranging the formula;

ΔT = Q ÷ mc

    = 2000 cal ÷ (250 g × 0.0558 cal/g°C)

    = 143.37 °C or K

The change in temperature is 143.37 K or °C

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.